Swimming in Hawaii in august 2025 Sea temperature by city in august

Do you want to go to the beach in Hawaii in august 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in august in Hawaii by city and our opinion on the chances of enjoying pleasant sea conditions.

Sea temperature in Hawaii in august 2025

Here, find the average sea temperature in Hawaii in august in several coastal cities.

Direct access: O'ahu in august | Kauaʻi in august | Maui in august | Big Island in august

O'ahu in august

Honolulu (Oahu)

on average:

80°F

min: 79°F / max: 81°F

La'ie

on average:

80°F

min: 79°F / max: 81°F

Waianae

on average:

80°F

min: 79°F / max: 81°F

'Aiea

on average:

80°F

min: 79°F / max: 81°F

'Ewa Beach

on average:

80°F

min: 79°F / max: 81°F

Hale'iwa

on average:

80°F

min: 78°F / max: 81°F

Kauaʻi in august

Kauai (Garden Isle)

on average:

79°F

min: 78°F / max: 81°F

Kekaha

on average:

80°F

min: 79°F / max: 81°F

Kilauea

on average:

79°F

min: 79°F / max: 81°F

Niihau

on average:

80°F

min: 79°F / max: 81°F

Lihue

on average:

80°F

min: 79°F / max: 81°F

Anahola

on average:

80°F

min: 78°F / max: 81°F

Maui in august

Maui

on average:

80°F

min: 79°F / max: 82°F

Hana

on average:

80°F

min: 79°F / max: 82°F

Kahului

on average:

80°F

min: 79°F / max: 81°F

Molokai

on average:

80°F

min: 79°F / max: 81°F

Kahoolawe

on average:

80°F

min: 78°F / max: 81°F

Lanai

on average:

80°F

min: 78°F / max: 82°F

Big Island in august

Hilo

on average:

80°F

min: 78°F / max: 81°F

Captain Cook

on average:

80°F

min: 79°F / max: 82°F

Pahala

on average:

80°F

min: 79°F / max: 82°F

island of Hawaii (Big Island)

on average:

80°F

min: 79°F / max: 82°F

Hawaiian Ocean View

on average:

80°F

min: 79°F / max: 82°F

Hawi

on average:

80°F

min: 78°F / max: 82°F

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Sea temperature in july in Hawaii

Sea temperature in september in Hawaii

Where should you go swimming in Hawaii in the month of august?

Swimming in Hawaii in august is ideal

In august in Hawaii swimming conditions are generally the same everywhere.

In august in Honolulu (Oahu), Kauai (Garden Isle), Maui, Hilo, Captain Cook, Hana, Kahului, Kekaha, Kilauea, La'ie, Molokai, Niihau, Pahala, Waianae, island of Hawaii (Big Island), Kahoolawe, Lanai, Lihue, 'Aiea, 'Ewa Beach, Anahola, Hale'iwa, Hau'ula, Hawaiian Ocean View, Hawi, Holualoa, Honoka'a, Kailua, Kalaheo, Kaneohe, Kapaau, Kaunakakai, Kihei, Koloa, Paia, Papa'ikou, Pearl City, Waialua, Waikoloa, Wailuku, Waimanalo, Waimea and Waipahu, swimming conditions are perfect! With water reaching a maximum of 81°F and an average of 80°F, going in the water (and staying there!) feels great.

Where to go swimming in Hawaii in august: the map of sea temperatures

ideal swimming

pleasant swimming

cool swimming

cold swimming

freezing swimming

Water temperature and seasonal norms in august

Honolulu (Oahu)

	July	August	September
Average sea temperature	79°F	80°F	81°F
Minimum sea temperature	78°F	79°F	79°F
Maximum sea temperature	81°F	81°F	83°F
Average outside temperature	81°F	81°F	81°F
Maximum outside temperature	83°F	83°F	83°F
Minimum outside temperature	79°F	79°F	79°F
Precipitation	1.6in	2.5in	2.6in
Number of days of precipitation	2 jour(s) (5%)	3 jour(s) (9%)	3 jour(s) (11%)
Cloud cover	36%	35%	33%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Honolulu (Oahu) in august

Kauai (Garden Isle)

	July	August	September
Average sea temperature	79°F	79°F	81°F
Minimum sea temperature	79°F	78°F	79°F
Maximum sea temperature	80°F	81°F	82°F
Average outside temperature	79°F	81°F	81°F
Maximum outside temperature	81°F	83°F	83°F
Minimum outside temperature	79°F	79°F	79°F
Precipitation	4.1in	4in	3.3in
Number of days of precipitation	6 jour(s) (20%)	5 jour(s) (17%)	4 jour(s) (15%)
Cloud cover	43%	43%	38%
Our opinion	pleasant swimming	ideal swimming	ideal swimming

More information on swimming in Kauai (Garden Isle) in august

Maui

	July	August	September
Average sea temperature	79°F	80°F	81°F
Minimum sea temperature	77°F	79°F	79°F
Maximum sea temperature	81°F	82°F	83°F
Average outside temperature	79°F	79°F	81°F
Maximum outside temperature	81°F	81°F	81°F
Minimum outside temperature	77°F	79°F	79°F
Precipitation	0.6in	1.1in	0.9in
Number of days of precipitation	0 jour(s) (1%)	1 jour(s) (4%)	1 jour(s) (3%)
Cloud cover	28%	28%	24%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Maui in august

Hilo

	July	August	September
Average sea temperature	79°F	80°F	79°F
Minimum sea temperature	77°F	78°F	78°F
Maximum sea temperature	81°F	81°F	81°F
Average outside temperature	74°F	74°F	76°F
Maximum outside temperature	76°F	76°F	77°F
Minimum outside temperature	72°F	72°F	74°F
Precipitation	3.5in	5.8in	3.9in
Number of days of precipitation	5 jour(s) (15%)	6 jour(s) (20%)	5 jour(s) (18%)
Cloud cover	32%	33%	31%
Our opinion	pleasant swimming	ideal swimming	ideal swimming

More information on swimming in Hilo in august

Captain Cook

	July	August	September
Average sea temperature	79°F	80°F	80°F
Minimum sea temperature	77°F	79°F	79°F
Maximum sea temperature	81°F	82°F	82°F
Average outside temperature	74°F	74°F	74°F
Maximum outside temperature	76°F	76°F	76°F
Minimum outside temperature	70°F	72°F	70°F
Precipitation	3.2in	4.4in	3.8in
Number of days of precipitation	4 jour(s) (12%)	5 jour(s) (18%)	6 jour(s) (22%)
Cloud cover	30%	28%	29%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Captain Cook in august

List of coastal cities in Hawaii

Honolulu (Oahu) in august	ideal swimming
Kauai (Garden Isle) in august	ideal swimming
Maui in august	ideal swimming
Hilo in august	ideal swimming
Captain Cook in august	ideal swimming
Hana in august	ideal swimming
Kahului in august	ideal swimming
Kekaha in august	ideal swimming
Kilauea in august	ideal swimming
La'ie in august	ideal swimming
Molokai in august	ideal swimming
Niihau in august	ideal swimming
Pahala in august	ideal swimming
Waianae in august	ideal swimming
island of Hawaii (Big Island) in august	ideal swimming
Kahoolawe in august	ideal swimming
Lanai in august	ideal swimming
Lihue in august	ideal swimming
'Aiea in august	ideal swimming
'Ewa Beach in august	ideal swimming
Anahola in august	ideal swimming
Hale'iwa in august	ideal swimming
Hau'ula in august	ideal swimming
Hawaiian Ocean View in august	ideal swimming
Hawi in august	ideal swimming
Holualoa in august	ideal swimming
Honoka'a in august	ideal swimming
Kailua in august	ideal swimming
Kalaheo in august	ideal swimming
Kaneohe in august	ideal swimming
Kapaau in august	ideal swimming
Kaunakakai in august	ideal swimming
Kihei in august	ideal swimming
Koloa in august	ideal swimming
Paia in august	ideal swimming
Papa'ikou in august	ideal swimming
Pearl City in august	ideal swimming
Waialua in august	ideal swimming
Waikoloa in august	ideal swimming
Wailuku in august	ideal swimming
Waimanalo in august	ideal swimming
Waimea in august	ideal swimming
Waipahu in august	ideal swimming