Swimming in Swansea in september 2025: Average sea temperature in september and tide times in september 2025

Average sea temperature in Swansea in september 2025.

In september, according to seasonal norms, the sea temperature in Swansea is:

Minimum: 61°F

Average: 62°F

Maximum: 64°F

Other useful seasonal weather averages in september:

  • Outside temperature: 56°F to 63°F
  • Most common weather: "Clear/Sunny"
  • The wind blows at 7.5mph
  • It rains a total of 4.1in, over 7 day(s).

Should we swim in Swansea in september?

No... The water temperature in Swansea in september is cold

Swimming in Swansea in september is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average sea temperature of 62°F (minimum: 61°F - maximum: 64°F).

Note also that in september, the climate is good with an average outside temperature of 59°F, 4.1in of precipitation (over 7 days) and 87.84 % humidity.

Water and normal seasonal temperatures in Swansea in september

September
Average sea temperature 62°F
Minimum sea temperature 61°F
Maximum sea temperature 64°F
Average outside temperature 59°F
Maximum outside temperature 63°F
Minimum outside temperature 56°F
Wind speed 14.9mph
Wind temperature 54°F
Precipitation 4.1in
Number of days of rain 7 jour(s)
(23%)
Humidity 88%
Visibility in kilometers 9.09km
Cloud cover 49%
Our opinion cold swimming

Chart of the tides in september 2025

Tide times in september 2025 in Swansea

Swim elsewhere in Wales in september

City Average T° Max. T° Our opinion
Cardiff in september62°F64°Fcold swimming
Pembrokeshire in september61°F63°Fcold swimming
Barmouth in september61°F62°Fcold swimming
Llandudno in september61°F63°Fcold swimming

Swim in Wales in september: sea temperature by city

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