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Coldest beach in Hawaii in September

111 coastal locations in Hawaii ranked by their typical September sea temperature. State-wide average in September: 27.2°C.

Coldest in September

Hana, Maui Island, Hawaii

26.8°C

State September average

27.2°C

across 111 coastal locations in Hawaii

Vs annual mean

+1.4°C

above the year-round state average

What the Hawaii water feels like 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

Where September fits in the year

September sits inside the state pattern shown on the left. Browse a different month for a fresh ranking.

Hawaii sea temperature map (live)

Today's reading at every Hawaii beach we track. The list below uses the typical September mean from a decade of daily history.

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 coldest Hawaii beaches in September

Sorted by typical September mean. Click any beach for the full location page.

# Location September mean
1 Kaanapali Hawaii 27.1°C
2 Kapalua Hawaii 27.1°C
3 Hanauma Bay, Oahu Island, Hawaii Hawaii 27.1°C
4 Hilo Hawaii 27.1°C
5 Makena, Maui Island, Hawaii Hawaii 27.1°C
6 Waimanalo, Oahu Island, Hawaii Hawaii 27.1°C
7 Wainaku Hawaii 27.1°C
8 Banzai Pipeline Hawaii 27.1°C
9 Ehukai Beach Park Hawaii 27.1°C
10 Haleiwa Hawaii 27.1°C
11 North Shore Hawaii 27.1°C
12 Papaikou Hawaii 27.1°C
13 Sunset Beach Hawaii 27.1°C
14 Waialua Hawaii 27.1°C
15 Waimea Bay Hawaii 27.1°C
16 Aiea Hawaii 27.0°C
17 Heeia Hawaii 27.0°C
18 Hickam Housing Hawaii 27.0°C
19 Honolulu Hawaii 27.0°C
20 Iroquois Point Hawaii 27.0°C
21 Kahaluu Hawaii 27.0°C
22 Kaimana Beach Hawaii 27.0°C
23 Kaneohe Hawaii 27.0°C
24 Pearl City Hawaii 27.0°C
25 Waikiki Hawaii 27.0°C
Show 25 more ▸
26 Kahului, Kahului Harbor Hawaii 27.0°C
27 Kihei, Maalaea Bay, Maui Island, Hawaii Hawaii 27.0°C
28 Kaunakakai Hawaii 27.0°C
29 Laie Bay, Oahu Island, Hawaii Hawaii 27.0°C
30 Molokai Hawaii 27.0°C
31 Waikane, Kaneohe Bay, Oahu Island, Hawaii Hawaii 27.0°C
32 Honuapo, Hawaii Island, Hawaii Hawaii 27.0°C
33 Kahului Hawaii 27.0°C
34 Kihei Hawaii 27.0°C
35 Maui Hawaii 27.0°C
36 Paia Hawaii 27.0°C
37 Sugar Beach Hawaii 27.0°C
38 Hauula Hawaii 26.9°C
39 Kaaawa Hawaii 26.9°C
40 Kahuku Hawaii 26.9°C
41 Laie Hawaii 26.9°C
42 Punaluu Hawaii 26.9°C
43 Hanauma Bay Hawaii 26.9°C
44 Kailua Hawaii 26.9°C
45 Lanikai Hawaii 26.9°C
46 Waimanalo Beach Hawaii 26.9°C
47 Hilo Bay Hawaii 26.9°C
48 Hilo, Hilo Bay, Kuhio Bay Island Hawaii 26.9°C
49 Hana Hawaii 26.9°C
50 Hana, Maui Island, Hawaii Hawaii 26.8°C

Warmest 10 in Hawaii in September

Same data flipped. The warmest spots in the state for this month.

# Location September mean
1 Laysan Island, Hawaii Hawaii 28.0°C
2 French Frigate Shoals Hawaii 27.7°C
3 East Island, French Frigate Shoals, Hawaii Hawaii 27.6°C
4 Kealakekua Bay Hawaii 27.6°C
5 Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii Hawaii 27.6°C
6 Nonopapa, Niihau Island, Hawaii Hawaii 27.6°C
7 Eleele Hawaii 27.5°C
8 Hanapepe Hawaii 27.5°C
9 Kekaha Hawaii 27.5°C
10 Lihue Hawaii 27.5°C

Other US states

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