Waves in Kumamoto

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 8:39 am (GMT+9)

Now · significant height 0.1 ft

Sea state: Calm (rippled) · Douglas 1
Period: 3.1 s · WNW
Swell: 0.1 ft · 3 s
Highest expected: 0.1 ft

Today the sea at Kumamoto is calm (rippled): 0.1 ft waves with a period of 3.1 s from the west-northwest. The swell, 0.1 ft at 3 s, comes from the west. Biggest waves: Monday 2, with waves up to 1.6 ft (smooth).

Wave height, next 7 days

1.02.03.0 ft 1.6 ft Now

Significant height: the average of the highest third of the waves, what an observer would estimate by eye. Swell: waves arriving from far away, longer.

The waves you may find today

Most common0.0 ft
Significant0.1 ft
Highest expected0.1 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 0.1 ft. Before heading out, expect waves of up to 0.1 ft.

The Douglas sea state scale

Degree	Name	Wave height
0	Calm (glassy)	0
1	Calm (rippled) · today	0.0 ft–0.3 ft
2	Smooth · week peak	0.3 ft–1.6 ft
3	Slight	1.6 ft–4.1 ft
4	Moderate	4.1 ft–8.2 ft
5	Rough	8.2 ft–13.1 ft
6	Very rough	13.1 ft–19.7 ft

Waves day by day

Day	Max wave	Sea state	Direction	Max period	Swell	Max wind
Today	0.4 ft	Smooth	W	4 s	0.4 ft W	5 mph NE
Fri 30	0.6 ft	Smooth	WSW	3 s	0.5 ft SW	8 mph SW
Sat 31	0.6 ft	Smooth	WNW	4 s	0.5 ft WNW	7 mph NNW
Sun 1	0.4 ft	Smooth	WSW	4 s	0.3 ft WSW	4 mph ENE
Mon 2	1.6 ft	Smooth	SW	4 s	1.0 ft SW	12 mph SW
Tue 3	1.0 ft	Smooth	NW	4 s	0.5 ft WNW	5 mph N
Wed 4	1.0 ft	Smooth	NNW	3 s	0.5 ft NNW	5 mph N

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Waves	0.4 ft	0.3 ft	0.1 ft	0.1 ft	0.1 ft	0.1 ft	0.3 ft	0.3 ft
Period	2.4 s	2.5 s	2.8 s	3.2 s	3.8 s	2.0 s	2.2 s	2.6 s
Direction	NNW	NNW	NW	WNW	W	WSW	SSW	SSW
Swell	0.4 ft · 2 s	0.3 ft · 2 s	0.1 ft · 2 s	0.1 ft · 3 s	0.1 ft · 4 s	0.1 ft · 1 s	0.3 ft · 2 s	0.3 ft · 2 s
Wind (mph)	3 E	3 E	3 E	2 N	3 NW	5 WNW	2 SE	3 ESE

Previous days

The waves over the last 14 days. Tap a day to see it hour by hour.

Day	Max wave	Period	Swell
Wed 28	1.0 ft NW	3 s	0.7 ft NW
Tue 27	1.3 ft NW	3 s	0.7 ft NW
Mon 26	1.3 ft NW	6 s	0.3 ft WNW
Sun 25	1.0 ft WSW	5 s	0.7 ft WSW
Sat 24	0.7 ft SSW	10 s	0.3 ft SSW
Fri 23	0.7 ft NNW	4 s	0.3 ft NNW
Thu 22	1.0 ft NW	3 s	0.3 ft NW

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	1.0 ft WSW	3 s	0.7 ft WSW
Tue 20	0.3 ft WSW	4 s	0.3 ft WSW
Mon 19	0.3 ft SW	4 s	0.3 ft SW
Sun 18	0.3 ft SSW	4 s	0.3 ft SSW
Sat 17	0.3 ft NNW	2 s	0.3 ft NNW
Fri 16	0.0 ft W	4 s	0.0 ft W
Thu 15	0.7 ft NW	4 s	0.3 ft NW

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the waves in KumamotoQuestions

How are the waves today in Kumamoto?

Calm (rippled) (0.1 ft with a period of 3.1 s from the west-northwest). The highest wave to expect is around 0.1 ft.

Which day will have the biggest waves this week?

Monday 2, with waves up to 1.6 ft (smooth).

What is the wave period?

The time, in seconds, between two crests. With long periods (over 10 s) waves come from far away, are cleaner and break harder; with short periods they are wind waves, choppier.

What is significant wave height?

The average of the highest third of the waves. One in seven is higher and, a few times a day, one comes in at almost double: today, about 0.1 ft.

More about Kumamoto today

Waves near Kumamoto

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Waves: Open-Meteo with Météo-France (MFWAM, up to 10 days) and ECMWF WAM, CC BY 4.0; wave grid point 4.0 mi away. Near the shore, the seabed and the shape of the coast change the waves.

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 8:39 am (local time).

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