ariasurf

外平海岸

上天草市, 日本

Sand

Right now

Conditions at 4:00 AM Japan Standard Time.

Poor

Flat (0.2 m) at 3 s, heading toward S, with strong onshore wind toward S.

Swell

0.2 m

3 s

Wind

29 km/h

Onshore

Tide

2.7 m

Falling

Weather

25 °C

Mostly clear

28 °C water

7-day forecast

Wave height and the best conditions expected each day.

Hourly forecast

Sunday, September 20, 2026

Time	Rating	Swell	Swell direction	Wind	Wind direction	Tide	Weather
12 AM	Poor	0.1 m · 2 s	S	23 km/h · 42 km/h gusts	SSW Onshore	3.4 m	Clear · 26 °C
1 AM	Poor	0.2 m · 2 s	S	26 km/h · 42 km/h gusts	SSW Onshore	3.3 m	Mostly clear · 26 °C
2 AM	Poor	0.2 m · 2 s	S	28 km/h · 41 km/h gusts	S Onshore	3.2 m	Mostly clear · 26 °C
3 AM	Poor	0.2 m · 2 s	S	28 km/h · 40 km/h gusts	SSW Onshore	3 m	Mostly clear · 25 °C
4 AM	Poor	0.2 m · 3 s	S	29 km/h · 46 km/h gusts	S Onshore	2.7 m	Mostly clear · 25 °C
5 AM	Poor	0.2 m · 3 s	SSE	30 km/h · 49 km/h gusts	S Onshore	2.5 m	Mostly clear · 25 °C
6 AM	Poor	0.1 m · 3 s	SSE	29 km/h · 48 km/h gusts	SSW Onshore	2.3 m	Clear · 25 °C
7 AM	Poor	0.1 m · 3 s	SSE	29 km/h · 51 km/h gusts	SSW Onshore	2.3 m	Clear · 25 °C
8 AM	Poor	0.1 m · 3 s	SSE	29 km/h · 54 km/h gusts	S Onshore	2.3 m	Mostly clear · 25 °C
9 AM	Poor	0.1 m · 3 s	SE	30 km/h · 56 km/h gusts	S Onshore	2.3 m	Mostly clear · 25 °C
10 AM	Poor	0.1 m · 3 s	SE	31 km/h · 60 km/h gusts	S Onshore	2.5 m	Mostly clear · 26 °C
11 AM	Poor	0.1 m · 3 s	SE	32 km/h · 61 km/h gusts	S Onshore	2.6 m	Mostly clear · 27 °C
12 PM	Poor	0.1 m · 3 s	SE	31 km/h · 61 km/h gusts	S Onshore	2.8 m	Clear · 28 °C
1 PM	Poor	0.1 m · 3 s	SSE	32 km/h · 58 km/h gusts	S Onshore	2.9 m	Clear · 28 °C
2 PM	Poor	0.1 m · 3 s	SSE	32 km/h · 56 km/h gusts	S Onshore	3.1 m	Clear · 28 °C
3 PM	Poor	0.1 m · 3 s	S	31 km/h · 57 km/h gusts	S Onshore	3.2 m	Clear · 29 °C
4 PM	Poor	0.1 m · 3 s	S	32 km/h · 59 km/h gusts	S Onshore	3.2 m	Clear · 29 °C
5 PM	Poor	0.1 m · 3 s	S	35 km/h · 59 km/h gusts	S Onshore	3.2 m	Clear · 28 °C
6 PM	Poor	0.1 m · 3 s	S	38 km/h · 57 km/h gusts	S Onshore	3.1 m	Clear · 27 °C
7 PM	Poor	0.1 m · 3 s	SSE	40 km/h · 58 km/h gusts	S Onshore	3.1 m	Clear · 27 °C
8 PM	Poor	0.1 m · 3 s	SE	40 km/h · 63 km/h gusts	S Onshore	3.1 m	Clear · 26 °C
9 PM	Poor	0.1 m · 3 s	SE	38 km/h · 64 km/h gusts	S Onshore	3 m	Clear · 26 °C
10 PM	Poor	0.1 m · 3 s	SE	36 km/h · 63 km/h gusts	S Onshore	3 m	Clear · 25 °C
11 PM	Poor	0.1 m · 4 s	SE	35 km/h · 63 km/h gusts	S Onshore	3 m	Clear · 25 °C