Waves in Jieshi

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 3:21 pm (GMT+8)

Now · significant height 3.2 ft

Sea state: Slight · Douglas 3
Period: 5.8 s · ESE
Swell: 2.4 ft · 6 s
Highest expected: 6.6 ft

Today the sea at Jieshi is slight: 3.2 ft waves with a period of 5.8 s from the east-southeast. The swell, 2.4 ft at 6 s, comes from the east-southeast.

Wave height, next 7 days

1.02.03.04.05.0 ft 4.7 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 common1.6 ft
Significant3.2 ft
Highest expected6.6 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 6.6 ft. Before heading out, expect waves of up to 6.6 ft.

The Douglas sea state scale

Degree	Name	Wave height
0	Calm (glassy)	0
1	Calm (rippled)	0.0 ft–0.3 ft
2	Smooth	0.3 ft–1.6 ft
3	Slight · today	1.6 ft–4.1 ft
4	Moderate · week peak	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	4.7 ft	Moderate	ESE	6 s	3.0 ft ESE	9 mph NE
Fri 30	2.6 ft	Slight	ESE	6 s	2.4 ft ESE	8 mph NE
Sat 31	3.8 ft	Slight	E	5 s	2.3 ft ESE	11 mph ENE
Sun 1	3.5 ft	Slight	ESE	6 s	3.1 ft ESE	7 mph ENE
Mon 2	2.9 ft	Slight	SE	7 s	2.8 ft SE	7 mph ENE
Tue 3	3.8 ft	Slight	ESE	7 s	2.3 ft ESE	11 mph ENE
Wed 4	3.6 ft	Slight	ESE	5 s	2.9 ft ESE	6 mph ENE

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	4.7 ft	4.5 ft	4.1 ft	3.7 ft	3.3 ft	3.2 ft	3.1 ft	2.9 ft
Period	5.7 s	5.7 s	5.6 s	5.8 s	5.9 s	5.9 s	5.8 s	5.9 s
Direction	E	E	E	ESE	ESE	ESE	ESE	ESE
Swell	2.6 ft · 6 s	2.8 ft · 5 s	2.8 ft · 5 s	2.9 ft · 4 s	2.6 ft · 5 s	2.4 ft · 6 s	2.5 ft · 5 s	2.6 ft · 5 s
Wind (mph)	6 ENE	6 NNE	5 NE	5 NNE	4 NE	2 SE	8 SE	3 NNE

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	5.2 ft E	6 s	3.3 ft E
Tue 27	5.2 ft E	6 s	2.6 ft E
Mon 26	3.3 ft E	5 s	2.3 ft E
Sun 25	1.6 ft E	10 s	1.3 ft ESE
Sat 24	2.3 ft N	9 s	1.3 ft ESE
Fri 23	5.9 ft E	14 s	4.9 ft ESE
Thu 22	4.9 ft ESE	13 s	4.3 ft ESE

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	3.0 ft ESE	10 s	2.3 ft ESE
Tue 20	2.3 ft ESE	6 s	2.3 ft ESE
Mon 19	2.6 ft ESE	6 s	2.6 ft ESE
Sun 18	3.3 ft ESE	6 s	3.0 ft SE
Sat 17	3.3 ft ESE	5 s	2.6 ft ESE
Fri 16	3.3 ft ESE	5 s	2.3 ft ESE
Thu 15	3.9 ft ESE	6 s	3.6 ft ESE

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 JieshiQuestions

How are the waves today in Jieshi?

Slight (3.2 ft with a period of 5.8 s from the east-southeast). The highest wave to expect is around 6.6 ft.

Which day will have the biggest waves this week?

Thursday 29, with waves up to 4.7 ft (moderate).

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 6.6 ft.

More about Jieshi today

Waves near Jieshi

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 3.1 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 3:21 pm (local time).

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