Sea weather in Joetsu in Japan All the beach weather in Joetsu
All the essential weather information for enjoying the beach in Joetsu in Japan, for swimming, tanning or water sports! Our sea weather data is reliable, easy to read and updated every day.
Weather: When should you go to the beach in Joetsu over the next 7 days?
Discover the best moment to go to the beach in Joetsu in Japan this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Joetsu. You can see full forecasts by clicking on the day you want to see in the table below.
| Date | Outside temp. | Max wind | Our opinion | Details |
|---|---|---|---|---|
| Monday 15 December 2025 | 41°F to 47°F | 14.3mph | not recommended | all the sea weather |
| Tuesday 16 December 2025 | 40°F to 50°F | 18.6mph | discouraged | all the sea weather |
| Wednesday 17 December 2025 | 40°F to 45°F | 6.2mph | discouraged | all the sea weather |
| Thursday 18 December 2025 | 36°F to 43°F | 6.8mph | discouraged | all the sea weather |
| Friday 19 December 2025 | 41°F to 50°F | 9.3mph | recommended | all the sea weather |
| Saturday 20 December 2025 | 49°F to 58°F | 8.7mph | discouraged | all the sea weather |
| Sunday 21 December 2025 | 54°F to 56°F | 7.5mph | recommended | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Joetsu
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 06:53 and will set at 16:31 on the beach(es) of Joetsu. The outside temperature will be a high of 47°F t and a low of 41°F. Precipitation is in the forecast (0.2in throughout the day): choose the right time to go to the beach and dodge the raindrops. Be careful, the sea will be generally rough with a wind speed of up to 32.9mph km/h (with gusts up to 44.1mph). Wave height will be up to 15.7ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  | | |  | | | | |
| Outside temperature | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) | 6°C (44°F) | 7°C (44°F) | 6°C (43°F) | 6°C (42°F) |
| Perceived temperature | 3°C (38°F) | 2°C (36°F) | 2°C (35°F) | 2°C (35°F) | 1°C (33°F) | 2°C (35°F) | 1°C (34°F) | 1°C (35°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 77% | 75% | 73% | 75% | 70% | 66% | 68% | 70% |
| Barometric pressure | 1007 hPa | 1011 hPa | 1014 hPa | 1017 hPa | 1019 hPa | 1020 hPa | 1023 hPa | 1023 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 93% | 85% | 77% | 77% |
| Heat index | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) | 6°C (44°F) | 7°C (44°F) | 6°C (43°F) | 6°C (42°F) |
| Dew point | 5°C (40°F) | 4°C (38°F) | 3°C (37°F) | 3°C (37°F) | 1°C (34°F) | 1°C (33°F) | 1°C (33°F) | 1°C (33°F) |
| Wind | ||||||||
| Speed | 53km/h (33mph) | 49km/h (30mph) | 45km/h (28mph) | 43km/h (27mph) | 47km/h (29mph) | 41km/h (25mph) | 32km/h (20mph) | 23km/h (15mph) |
| Gusts | 71km/h (44mph) | 54km/h (34mph) | 49km/h (30mph) | 44km/h (27mph) | 62km/h (39mph) | 42km/h (26mph) | 45km/h (28mph) | 34km/h (21mph) |
| Direction | 298° WNW | 311° NW | 310° NW | 300° WNW | 288° WNW | 285° WNW | 282° WNW | 257° WSW |
| Wind chill | 3°C (38°F) | 2°C (36°F) | 2°C (35°F) | 2°C (35°F) | 1°C (33°F) | 2°C (35°F) | 1°C (34°F) | 1°C (35°F) |
| Waves | ||||||||
| Height | 3.8m (12.4ft) | 4.2m (13.8ft) | 4.8m (15.6ft) | 4.2m (13.9ft) | 3.7m (12.2ft) | 3.2m (10.6ft) | 2.8m (9.2ft) | 2.5m (8.1ft) |
| Direction | 294° WNW | 307° NW | 319° NW | 324° NW | 328° NNW | 335° NNW | 337° NNW | 330° NNW |
| Period | 7.0 sec. | 7.0 sec. | 7.0 sec. | 7.0 sec. | 7.0 sec. | 7.0 sec. | 10.0 sec. | 8.8 sec. |
| Significant height | 2.0m (6.6ft) | 1.7m (5.6ft) | 1.5m (4.9ft) | 1.5m (4.9ft) | 1.6m (5.2ft) | 1.4m (4.6ft) | 0.8m (2.6ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 06:54 and will set at 16:31 on the beach(es) of Joetsu. The outside temperature will be a high of 50°F t and a low of 40°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 19.3mph km/h (with gusts up to 28mph). Wave height will be up to 7.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | |  |  |  | | | |
| Outside temperature | 5°C (42°F) | 5°C (41°F) | 4°C (40°F) | 6°C (42°F) | 9°C (49°F) | 10°C (50°F) | 8°C (47°F) | 8°C (47°F) |
| Perceived temperature | 2°C (35°F) | 1°C (34°F) | 1°C (33°F) | 2°C (36°F) | 7°C (44°F) | 7°C (44°F) | 4°C (40°F) | 4°C (39°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0.1in |
| Humidity | 67% | 67% | 65% | 60% | 52% | 64% | 74% | 80% |
| Barometric pressure | 1023 hPa | 1023 hPa | 1023 hPa | 1022 hPa | 1019 hPa | 1019 hPa | 1020 hPa | 1020 hPa |
| Cloud cover | 69% | 78% | 45% | 70% | 48% | 76% | 78% | 83% |
| Heat index | 5°C (42°F) | 5°C (41°F) | 4°C (40°F) | 6°C (42°F) | 9°C (49°F) | 10°C (50°F) | 8°C (47°F) | 8°C (47°F) |
| Dew point | -0°C (32°F) | -1°C (31°F) | -2°C (29°F) | -1°C (29°F) | -0°C (32°F) | 4°C (39°F) | 4°C (39°F) | 5°C (41°F) |
| Wind | ||||||||
| Speed | 19km/h (12mph) | 18km/h (11mph) | 16km/h (10mph) | 18km/h (11mph) | 16km/h (10mph) | 31km/h (19mph) | 31km/h (19mph) | 30km/h (19mph) |
| Gusts | 28km/h (17mph) | 28km/h (17mph) | 25km/h (16mph) | 25km/h (15mph) | 22km/h (14mph) | 45km/h (28mph) | 36km/h (22mph) | 44km/h (28mph) |
| Direction | 233° SW | 216° SW | 193° SSW | 173° S | 217° SW | 243° WSW | 243° WSW | 287° WNW |
| Wind chill | 2°C (35°F) | 1°C (34°F) | 1°C (33°F) | 2°C (36°F) | 7°C (44°F) | 7°C (44°F) | 4°C (40°F) | 4°C (39°F) |
| Waves | ||||||||
| Height | 2.2m (7.1ft) | 1.9m (6.2ft) | 1.6m (5.4ft) | 1.4m (4.7ft) | 1.2m (4.0ft) | 1.4m (4.8ft) | 1.7m (5.4ft) | 1.8m (5.9ft) |
| Direction | 332° NNW | 334° NNW | 331° NNW | 334° NNW | 331° NNW | 320° NW | 305° NW | 306° NW |
| Period | 8.9 sec. | 8.5 sec. | 8.2 sec. | 8.0 sec. | 7.4 sec. | 6.7 sec. | 8.5 sec. | 6.9 sec. |
| Significant height | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.6m (2ft) | 1.5m (4.9ft) | 1.5m (4.9ft) | 0.8m (2.6ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 06:55 and will set at 16:31 on the beach(es) of Joetsu. The outside temperature will be a high of 45°F t and a low of 40°F. Precipitation is in the forecast (0.3in throughout the day): choose the right time to go to the beach and dodge the raindrops. The sea will be generally calm, with a wind speed of up to 12.4mph km/h (with gusts up to 16.8mph). Wave height will be up to 5.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  | | | | |  |  | |
| Outside temperature | 7°C (44°F) | 6°C (43°F) | 5°C (42°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (40°F) | 4°C (40°F) |
| Perceived temperature | 4°C (39°F) | 3°C (37°F) | 2°C (35°F) | 2°C (35°F) | 2°C (35°F) | 1°C (34°F) | 1°C (34°F) | 2°C (35°F) |
| Precipitation | 0.1in | 0in | 0in | 0in | 0in | 0.1in | 0in | 0in |
| Humidity | 87% | 88% | 92% | 93% | 91% | 96% | 93% | 93% |
| Barometric pressure | 1021 hPa | 1021 hPa | 1022 hPa | 1022 hPa | 1020 hPa | 1021 hPa | 1023 hPa | 1024 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Heat index | 7°C (44°F) | 6°C (43°F) | 5°C (42°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (40°F) | 4°C (40°F) |
| Dew point | 5°C (40°F) | 4°C (40°F) | 4°C (40°F) | 4°C (39°F) | 4°C (39°F) | 4°C (40°F) | 3°C (38°F) | 3°C (38°F) |
| Wind | ||||||||
| Speed | 15km/h (9mph) | 17km/h (10mph) | 18km/h (11mph) | 15km/h (9mph) | 14km/h (9mph) | 20km/h (12mph) | 15km/h (10mph) | 10km/h (6mph) |
| Gusts | 21km/h (13mph) | 23km/h (14mph) | 24km/h (15mph) | 20km/h (12mph) | 19km/h (12mph) | 27km/h (17mph) | 21km/h (13mph) | 13km/h (8mph) |
| Direction | 327° NNW | 352° N | 14° NNE | 58° ENE | 69° ENE | 19° NNE | 29° NNE | 56° NE |
| Wind chill | 4°C (39°F) | 3°C (37°F) | 2°C (35°F) | 2°C (35°F) | 2°C (35°F) | 1°C (34°F) | 1°C (34°F) | 2°C (35°F) |
| Waves | ||||||||
| Height | 1.6m (5.3ft) | 1.5m (4.9ft) | 1.5m (4.8ft) | 1.5m (4.8ft) | 1.5m (4.9ft) | 1.5m (5.0ft) | 1.5m (5.1ft) | 1.5m (4.9ft) |
| Direction | 314° NW | 320° NW | 324° NW | 334° NNW | 333° NNW | 331° NNW | 334° NNW | 334° NNW |
| Period | 6.8 sec. | 7.5 sec. | 7.5 sec. | 7.6 sec. | 7.6 sec. | 7.6 sec. | 7.9 sec. | 8.1 sec. |
| Significant height | 0.5m (1.6ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.3m (1ft) | 0.2m (0.7ft) | 0.1m (0.3ft) | 0.1m (0.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |
Sea weather on Thursday 18 December 2025
On Thursday 18 December 2025, the sun will rise at 06:55 and will set at 16:32 on the beach(es) of Joetsu. The outside temperature will be a high of 43°F t and a low of 36°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 6.8mph km/h (with gusts up to 11.2mph). Wave height will be up to 4.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | |  |
| Outside temperature | 4°C (39°F) | 4°C (39°F) | 5°C (40°F) | 5°C (41°F) | 6°C (43°F) | 6°C (42°F) | 4°C (40°F) | 6°C (42°F) |
| Perceived temperature | 3°C (38°F) | 4°C (39°F) | 5°C (40°F) | 3°C (38°F) | 5°C (40°F) | 4°C (40°F) | 3°C (37°F) | 3°C (38°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 95% | 89% | 86% | 80% | 68% | 64% | 67% | 71% |
| Barometric pressure | 1025 hPa | 1026 hPa | 1028 hPa | 1028 hPa | 1027 hPa | 1026 hPa | 1027 hPa | 1027 hPa |
| Cloud cover | 100% | 100% | 100% | 80% | 80% | 5% | 3% | 0% |
| Heat index | 4°C (39°F) | 4°C (39°F) | 5°C (40°F) | 5°C (41°F) | 6°C (43°F) | 6°C (42°F) | 4°C (40°F) | 6°C (42°F) |
| Dew point | 3°C (38°F) | 2°C (36°F) | 2°C (36°F) | 2°C (35°F) | 1°C (33°F) | -1°C (31°F) | -1°C (30°F) | 1°C (33°F) |
| Wind | ||||||||
| Speed | 4km/h (3mph) | 2km/h (1mph) | 3km/h (2mph) | 9km/h (5mph) | 7km/h (4mph) | 7km/h (4mph) | 6km/h (4mph) | 11km/h (7mph) |
| Gusts | 6km/h (4mph) | 2km/h (2mph) | 4km/h (2mph) | 11km/h (7mph) | 9km/h (6mph) | 12km/h (7mph) | 14km/h (8mph) | 18km/h (11mph) |
| Direction | 127° SE | 51° NE | 149° SSE | 127° SE | 74° ENE | 45° NE | 102° ESE | 135° SE |
| Wind chill | 3°C (38°F) | 4°C (39°F) | 5°C (40°F) | 3°C (38°F) | 5°C (40°F) | 4°C (40°F) | 3°C (37°F) | 3°C (38°F) |
| Waves | ||||||||
| Height | 1.4m (4.7ft) | 1.4m (4.6ft) | 1.4m (4.6ft) | 1.4m (4.5ft) | 1.3m (4.3ft) | 1.2m (4.1ft) | 1.2m (3.9ft) | 1.1m (3.7ft) |
| Direction | 336° NNW | 335° NNW | 333° NNW | 332° NNW | 332° NNW | 331° NNW | 332° NNW | 333° NNW |
| Period | 8.6 sec. | 7.7 sec. | 7.7 sec. | 8.1 sec. | 8.0 sec. | 7.8 sec. | 7.5 sec. | 7.5 sec. |
| Significant height | 0.1m (0.3ft) | 1.4m (4.6ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.2m (0.7ft) | 1.4m (4.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 06:56 and will set at 16:32 on the beach(es) of Joetsu. The outside temperature will be a high of 50°F t and a low of 41°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 9.3mph km/h (with gusts up to 18.6mph). Wave height will be up to 3.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 6°C (42°F) | 6°C (42°F) | 6°C (42°F) | 7°C (45°F) | 8°C (47°F) | 9°C (49°F) | 6°C (42°F) | 9°C (47°F) |
| Perceived temperature | 3°C (37°F) | 3°C (38°F) | 3°C (37°F) | 5°C (41°F) | 6°C (44°F) | 8°C (46°F) | 3°C (37°F) | 6°C (43°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 67% | 63% | 61% | 57% | 48% | 48% | 60% | 57% |
| Barometric pressure | 1026 hPa | 1027 hPa | 1027 hPa | 1028 hPa | 1026 hPa | 1026 hPa | 1026 hPa | 1026 hPa |
| Cloud cover | 0% | 0% | 0% | 4% | 1% | 2% | 0% | 0% |
| Heat index | 6°C (42°F) | 6°C (42°F) | 6°C (42°F) | 7°C (45°F) | 8°C (47°F) | 9°C (49°F) | 6°C (42°F) | 9°C (47°F) |
| Dew point | -0°C (32°F) | -1°C (31°F) | -1°C (30°F) | -0°C (31°F) | -2°C (28°F) | -1°C (30°F) | -2°C (29°F) | 1°C (33°F) |
| Wind | ||||||||
| Speed | 13km/h (8mph) | 12km/h (8mph) | 14km/h (9mph) | 13km/h (8mph) | 10km/h (6mph) | 10km/h (6mph) | 13km/h (8mph) | 15km/h (10mph) |
| Gusts | 21km/h (13mph) | 21km/h (13mph) | 24km/h (15mph) | 20km/h (13mph) | 21km/h (13mph) | 20km/h (12mph) | 28km/h (17mph) | 30km/h (18mph) |
| Direction | 150° SSE | 171° S | 172° S | 160° SSE | 149° SSE | 141° SE | 147° SSE | 150° SSE |
| Wind chill | 3°C (37°F) | 3°C (38°F) | 3°C (37°F) | 5°C (41°F) | 6°C (44°F) | 8°C (46°F) | 3°C (37°F) | 6°C (43°F) |
| Waves | ||||||||
| Height | 1.0m (3.4ft) | 0.9m (3.1ft) | 0.8m (2.8ft) | 0.7m (2.4ft) | 0.6m (2.1ft) | 0.5m (1.7ft) | 0.4m (1.5ft) | 0.4m (1.2ft) |
| Direction | 336° NNW | 341° NNW | 337° NNW | 341° NNW | 351° N | 348° NNW | 351° N | 337° NNW |
| Period | 8.0 sec. | 7.5 sec. | 8.0 sec. | 7.2 sec. | 7.3 sec. | 7.2 sec. | 6.8 sec. | 6.7 sec. |
| Significant height | 1.1m (3.6ft) | 1.4m (4.6ft) | 1.0m (3.3ft) | 1.1m (3.6ft) | 0.9m (3ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.4m (1.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |
Sea weather on Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 06:56 and will set at 16:32 on the beach(es) of Joetsu. The outside temperature will be a high of 58°F t and a low of 49°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 13.1mph km/h (with gusts up to 18mph). Wave height will be up to 2.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 9°C (48°F) | 9°C (48°F) | 10°C (49°F) | 10°C (50°F) | 13°C (55°F) | 14°C (57°F) | 13°C (55°F) | 12°C (53°F) |
| Perceived temperature | 6°C (44°F) | 6°C (43°F) | 7°C (44°F) | 7°C (45°F) | 12°C (53°F) | 14°C (57°F) | 12°C (54°F) | 10°C (50°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 56% | 54% | 49% | 52% | 49% | 57% | 62% | 65% |
| Barometric pressure | 1025 hPa | 1025 hPa | 1024 hPa | 1025 hPa | 1023 hPa | 1023 hPa | 1024 hPa | 1024 hPa |
| Cloud cover | 0% | 0% | 7% | 45% | 32% | 45% | 30% | 22% |
| Heat index | 9°C (48°F) | 9°C (48°F) | 10°C (49°F) | 10°C (50°F) | 13°C (55°F) | 14°C (57°F) | 13°C (55°F) | 12°C (53°F) |
| Dew point | 1°C (33°F) | 0°C (32°F) | -1°C (31°F) | 1°C (33°F) | 3°C (37°F) | 6°C (42°F) | 5°C (42°F) | 5°C (42°F) |
| Wind | ||||||||
| Speed | 15km/h (9mph) | 19km/h (12mph) | 19km/h (12mph) | 21km/h (13mph) | 12km/h (8mph) | 6km/h (4mph) | 6km/h (4mph) | 14km/h (9mph) |
| Gusts | 29km/h (18mph) | 20km/h (13mph) | 24km/h (15mph) | 26km/h (16mph) | 20km/h (13mph) | 11km/h (7mph) | 12km/h (8mph) | 26km/h (16mph) |
| Direction | 152° SSE | 154° SSE | 161° SSE | 145° SE | 154° SSE | 146° SSE | 142° SE | 146° SSE |
| Wind chill | 6°C (44°F) | 6°C (43°F) | 7°C (44°F) | 7°C (45°F) | 12°C (53°F) | 14°C (57°F) | 12°C (54°F) | 10°C (50°F) |
| Waves | ||||||||
| Height | 0.3m (1.0ft) | 0.3m (0.9ft) | 0.4m (1.2ft) | 0.6m (1.8ft) | 0.7m (2.4ft) | 0.8m (2.7ft) | 0.8m (2.8ft) | 0.7m (2.4ft) |
| Direction | 344° NNW | 319° NW | 299° WNW | 298° WNW | 295° WNW | 293° WNW | 290° WNW | 286° WNW |
| Period | 6.5 sec. | 6.2 sec. | 6.2 sec. | 6.6 sec. | 7.2 sec. | 7.5 sec. | 7.7 sec. | 7.4 sec. |
| Significant height | 0.4m (1.3ft) | 0.3m (1ft) | 0.6m (2ft) | 0.8m (2.6ft) | 1.0m (3.3ft) | 1.1m (3.6ft) | 1.2m (3.9ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |
Sea weather on Sunday 21 December 2025
On Sunday 21 December 2025, the sun will rise at 06:57 and will set at 16:33 on the beach(es) of Joetsu. The outside temperature will be a high of 56°F t and a low of 54°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. The sea will be generally calm, with a wind speed of up to 9.3mph km/h (with gusts up to 17.4mph). Wave height will be up to 2.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | |  | |
| Outside temperature | 12°C (53°F) | 12°C (53°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (56°F) | 12°C (54°F) | 12°C (54°F) |
| Perceived temperature | 10°C (50°F) | 10°C (51°F) | 11°C (52°F) | 11°C (53°F) | 12°C (54°F) | 12°C (54°F) | 12°C (54°F) | 11°C (52°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0.1in | 0in |
| Humidity | 65% | 69% | 73% | 80% | 77% | 77% | 87% | 89% |
| Barometric pressure | 1021 hPa | 1019 hPa | 1018 hPa | 1017 hPa | 1012 hPa | 1009 hPa | 1010 hPa | 1006 hPa |
| Cloud cover | 31% | 48% | 56% | 67% | 53% | 52% | 87% | 72% |
| Heat index | 12°C (53°F) | 12°C (53°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (56°F) | 12°C (54°F) | 12°C (54°F) |
| Dew point | 5°C (41°F) | 7°C (44°F) | 8°C (46°F) | 9°C (49°F) | 9°C (48°F) | 9°C (49°F) | 10°C (50°F) | 11°C (51°F) |
| Wind | ||||||||
| Speed | 13km/h (8mph) | 15km/h (9mph) | 15km/h (10mph) | 13km/h (8mph) | 12km/h (7mph) | 10km/h (6mph) | 4km/h (2mph) | 12km/h (8mph) |
| Gusts | 24km/h (15mph) | 28km/h (17mph) | 28km/h (18mph) | 22km/h (14mph) | 19km/h (12mph) | 17km/h (11mph) | 7km/h (4mph) | 21km/h (13mph) |
| Direction | 134° SE | 137° SE | 147° SSE | 144° SE | 106° ESE | 99° E | 309° NW | 163° SSE |
| Wind chill | 10°C (50°F) | 10°C (51°F) | 11°C (52°F) | 11°C (53°F) | 12°C (54°F) | 12°C (54°F) | 12°C (54°F) | 11°C (52°F) |
| Waves | ||||||||
| Height | 0.7m (2.2ft) | 0.7m (2.2ft) | 0.7m (2.2ft) | 0.6m (2.1ft) | 0.6m (1.9ft) | 0.5m (1.6ft) | 0.4m (1.4ft) | 0.4m (1.3ft) |
| Direction | 286° WNW | 297° WNW | 296° WNW | 295° WNW | 293° WNW | 293° WNW | 292° WNW | 292° WNW |
| Period | 7.1 sec. | 8.2 sec. | 7.8 sec. | 7.4 sec. | 7.2 sec. | 6.9 sec. | 6.7 sec. | 6.6 sec. |
| Significant height | 0.9m (3ft) | 0.9m (3ft) | 1.0m (3.3ft) | 0.9m (3ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.6m (2ft) |
| Sea water temperature | ||||||||
| Water temperature | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |