Where is the sea warmest in Hawaii in August?

Big Beach in United States has the warmest sea in Hawaii in August, averaging about 28.0 °C. Hamoa Beach (28.0 °C) and Diamond Head Beach follow close behind.

How many beaches in Hawaii are warm enough to swim in August?

25 of the top 25 ranked beaches in Hawaii average 22 °C or more in August, which most swimmers find comfortable without a wetsuit.

How are these August sea temperatures calculated?

Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical August rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

Seasonal ranking

Warmest sea temperature in Hawaii in August

Where the sea is warmest across Hawaii during August, ranked by long-term monthly average water temperature. Big Beach (Maui, United States) tops the list at around 28°C. Open any spot for today's live water temperature and a 7-day swim forecast.

1
Big Beach
Maui · United States · Pacific Ocean
Warm — comfortable swimming
28°C
August average
2
Hamoa Beach
Maui · United States · Pacific Ocean
Warm — comfortable swimming
28°C
August average
3
Diamond Head Beach
Oahu · United States · Pacific Ocean
Warm — comfortable swimming
28°C
August average
4
Little Beach Maui
Maui · United States · Pacific Ocean
Warm — comfortable swimming
28°C
August average
5
Napili Bay
Maui · United States · Pacific Ocean
Warm — comfortable swimming
28°C
August average
6
Waimanalo Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
7
Sunset Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
8
Ko Olina Lagoons
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
9
Kee Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
10
Kua Bay
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
11
Hapuna Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
12
Makalawena Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
13
Poipu Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
14
Lydgate Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
15
Papohaku Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
16
Lanikai Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
17
Bellows Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
18
Wailea Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
19
Kapalua Bay
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
20
Hookipa Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
21
Turtle Bay
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
22
Mokuleia Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
23
Polihua Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
24
Halawa Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average
25
Salt Pond Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
August average

Warmest sea in August elsewhere

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Hawaii in August — frequently asked questions

Where is the sea warmest in Hawaii in August?: Big Beach in United States has the warmest sea in Hawaii in August, averaging about 28.0 °C. Hamoa Beach (28.0 °C) and Diamond Head Beach follow close behind.
How many beaches in Hawaii are warm enough to swim in August?: 25 of the top 25 ranked beaches in Hawaii average 22 °C or more in August, which most swimmers find comfortable without a wetsuit.
How are these August sea temperatures calculated?: Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical August rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

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