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Warmest beach in Hawaii

111 coastal locations in Hawaii ranked by year-round average sea temperature. The state-wide average is 25.8°C. The peak month is September at 27.2°C. Click any beach for its 30-day chart and 10-year history.

Warmest year-round

Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii

26.4°C annual mean

State-wide average

25.8°C

across 111 Hawaii coastal locations

Warmest month

September

27.2°C state-wide average

What the water feels like at peak in September

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

Hawaii monthly average 24.4°C to 27.2°C
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  • Warmest month September 27.2°C
  • Coldest month March 24.4°C
  • Annual mean 25.8°C
  • Months above 20°C 12 of 12

Month by month around the Hawaii coast

Hawaii sea temperatures swing from 24.4°C in March to 27.2°C in September on average across the coast. That's a spread of 3°C. Pick a single month for a focused ranking:

Hawaii sea temperature map

Today's pin colours show the latest daily reading at every Hawaii beach we track. Drag and zoom; click any pin for that beach's full page.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 warmest beaches in Hawaii

Sorted by year-round average. Click any beach for its 30-day chart, monthly profile, and 10-year history.

# Location Annual mean
1 Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii Hawaii 26.4°C
2 Kealakekua Bay Hawaii 26.3°C
3 Island of Hawaii Hawaii 26.3°C
4 Kahaluu-Keauhou Hawaii 26.3°C
5 Kailua Kona Hawaii 26.3°C
6 Kua Bay Hawaii 26.1°C
7 Hapuna Beach Hawaii 26.1°C
8 Nonopapa, Niihau Island, Hawaii Hawaii 26.1°C
9 Puako Hawaii 26.1°C
10 Waikoloa Village Hawaii 26.1°C
11 Kaumalapau, Lanai Island, Hawaii Hawaii 26.1°C
12 Eleele Hawaii 26.1°C
13 Hanapepe Hawaii 26.1°C
14 Kekaha Hawaii 26.1°C
15 Lihue Hawaii 26.1°C
16 Poipu Hawaii 26.1°C
17 Port Allen, Hanapepe Bay, Kauai Island Hawaii 26.1°C
18 Waimea Bay, Kauai Island, Hawaii Hawaii 26.1°C
19 Kuheia Bay, Kahoolawe Island, Hawaii Hawaii 26.0°C
20 Mahukona, Hawaii Island, Hawaii Hawaii 26.0°C
21 Smuggler Cove, Kahoolawe Island, Hawaii Hawaii 26.0°C
22 Waianae, Oahu Island, Hawaii Hawaii 26.0°C
23 Hanamaulu Bay, Kauai Island, Hawaii Hawaii 26.0°C
24 Nawiliwili, Nawiliwili Harbor, Kauai Island Hawaii 26.0°C
25 Kaunakakai Harbor, Molokai Island Hawaii 25.9°C
Show 25 more ▸
26 Kolo, Molokai Island, Hawaii Hawaii 25.9°C
27 Kawaihae Hawaii 25.9°C
28 Makena, Maui Island, Hawaii Hawaii 25.9°C
29 Fort Kamehameha, Bishop Point, Pearl Harbor, Oahu Island Hawaii 25.9°C
30 Honolulu, Honolulu Harbor, Oahu Island Hawaii 25.9°C
31 Moku o Loe, Kaneohe Bay, Oahu Island Hawaii 25.9°C
32 Pearl Harbor, Ford Island Ferry Dock, Oahu Island Hawaii 25.9°C
33 Lanai Hawaii 25.9°C
34 Haleiwa, Waialua Bay, Oahu Island, Hawaii Hawaii 25.9°C
35 Kamalo Harbor, Molokai Island, Hawaii Hawaii 25.9°C
36 Pukoo Harbor, Molokai Island, Hawaii Hawaii 25.9°C
37 Honuapo, Hawaii Island, Hawaii Hawaii 25.8°C
38 Molokini Hawaii 25.8°C
39 Wailea Hawaii 25.8°C
40 Waimea Hawaii 25.8°C
41 Ewa Beach Hawaii 25.8°C
42 Ko Olina Hawaii 25.8°C
43 Maili Hawaii 25.8°C
44 Makaha Hawaii 25.8°C
45 Nanakuli Hawaii 25.8°C
46 Oahu Hawaii 25.8°C
47 Waianae Hawaii 25.8°C
48 Waipahu Hawaii 25.8°C
49 Hanauma Bay, Oahu Island, Hawaii Hawaii 25.8°C
50 Waimanalo, Oahu Island, Hawaii Hawaii 25.8°C

Coldest 10 in Hawaii

Same data, sorted the other way.

# Location Annual mean
1 Laysan Island, Hawaii Hawaii 25.3°C
2 Hauula Hawaii 25.5°C
3 Kaaawa Hawaii 25.5°C
4 Kahuku Hawaii 25.5°C
5 Laie Hawaii 25.5°C
6 Punaluu Hawaii 25.5°C
7 Hana Hawaii 25.6°C
8 Hanauma Bay Hawaii 25.6°C
9 Kailua Hawaii 25.6°C
10 Lanikai Hawaii 25.6°C

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