Where is the sea warmest in Japan in August?

Naminoue Beach in Japan has the warmest sea in Japan in August, averaging about 28.0 °C. Emerald Beach (28.0 °C) and Manza Beach follow close behind.

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

23 of the top 23 ranked beaches in Japan 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 Japan in August

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

1
Naminoue Beach
Okinawa · Japan · East China Sea
Warm — comfortable swimming
28°C
August average
2
Emerald Beach
Okinawa · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
3
Manza Beach
Okinawa · Japan · East China Sea
Warm — comfortable swimming
28°C
August average
4
Mibaru Beach
Okinawa · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
5
Nishihama Beach
Okinawa · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
6
Yonaha Maehama
Okinawa · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
7
Furuzamami Beach
Okinawa · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
8
Shirahama Beach
Wakayama · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
9
Katsurahama Beach
Kochi · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
10
Nigishima Beach
Mie · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
11
Ibusuki Beach
Kagoshima · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
12
Aoshima Beach
Miyazaki · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
13
Suma Beach
Hyogo · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
14
Sunset Beach Chatan
Okinawa · Japan · East China Sea
Warm — comfortable swimming
28°C
August average
15
Shirahama Beach Izu
Shizuoka · Japan · Pacific Ocean
Warm — comfortable swimming
28°C
August average
16
Yuigahama Beach
Kanagawa · Japan · Pacific Ocean
Warm — comfortable swimming
24°C
August average
17
Zushi Beach
Kanagawa · Japan · Pacific Ocean
Warm — comfortable swimming
24°C
August average
18
Enoshima Beach
Kanagawa · Japan · Pacific Ocean
Warm — comfortable swimming
24°C
August average
19
Kujukuri Beach
Chiba · Japan · Pacific Ocean
Warm — comfortable swimming
24°C
August average
20
Onjuku Beach
Chiba · Japan · Pacific Ocean
Warm — comfortable swimming
24°C
August average
21
Kujukuri Beach
Chiba · Japan · Pacific Ocean
Warm — comfortable swimming
24°C
August average
22
Kabira Bay
Okinawa · Japan · Pacific Ocean
Pleasant — swimmable without a wetsuit
23°C
August average
23
Kondoi Beach
Okinawa · Japan · Pacific Ocean
Pleasant — swimmable without a wetsuit
23°C
August average

Warmest sea in August elsewhere

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Japan in August — frequently asked questions

Where is the sea warmest in Japan in August?: Naminoue Beach in Japan has the warmest sea in Japan in August, averaging about 28.0 °C. Emerald Beach (28.0 °C) and Manza Beach follow close behind.
How many beaches in Japan are warm enough to swim in August?: 23 of the top 23 ranked beaches in Japan 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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