Where is the sea coldest in Hawaii in October?

Big Beach in United States has the coldest sea in Hawaii in October, averaging about 25.0 °C. Hamoa Beach (25.0 °C) and Diamond Head Beach are the next coolest.

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

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

How are these October sea temperatures calculated?

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

Seasonal ranking

Coldest sea temperature in Hawaii in October

Where the sea is coolest across Hawaii during October, ranked by long-term monthly average water temperature. Big Beach (Maui, United States) is the coolest at around 25°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
25°C
October average
2
Hamoa Beach
Maui · United States · Pacific Ocean
Warm — comfortable swimming
25°C
October average
3
Diamond Head Beach
Oahu · United States · Pacific Ocean
Warm — comfortable swimming
25°C
October average
4
Little Beach Maui
Maui · United States · Pacific Ocean
Warm — comfortable swimming
25°C
October average
5
Napili Bay
Maui · United States · Pacific Ocean
Warm — comfortable swimming
25°C
October average
6
Waimanalo Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
7
Sunset Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
8
Ko Olina Lagoons
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
9
Kee Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
10
Kua Bay
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
11
Hapuna Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
12
Makalawena Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
13
Poipu Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
14
Lydgate Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
15
Papohaku Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
16
Lanikai Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
17
Bellows Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
18
Wailea Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
19
Kapalua Bay
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
20
Hookipa Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
21
Turtle Bay
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
22
Mokuleia Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
23
Polihua Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
24
Halawa Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average
25
Salt Pond Beach
Hawaii · United States · Pacific Ocean
Warm — comfortable swimming
27°C
October average

Coldest sea in October elsewhere

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Hawaii in October — frequently asked questions

Where is the sea coldest in Hawaii in October?: Big Beach in United States has the coldest sea in Hawaii in October, averaging about 25.0 °C. Hamoa Beach (25.0 °C) and Diamond Head Beach are the next coolest.
How many beaches in Hawaii are warm enough to swim in October?: 25 of the top 25 ranked beaches in Hawaii average 22 °C or more in October, which most swimmers find comfortable without a wetsuit.
How are these October sea temperatures calculated?: Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical October rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

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