Waves in Grand Sable

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 2:54 pm (GMT+4)

Now · significant height 4.9 ft

Sea state: Moderate · Douglas 4
Period: 8.3 s · ESE
Swell: 4.1 ft · 6 s
Highest expected: 9.9 ft

Today the sea at Grand Sable is moderate: 4.9 ft waves with a period of 8.3 s from the east-southeast. The swell, 4.1 ft at 6 s, comes from the east-southeast. Biggest waves: Sunday 1, with waves up to 6.0 ft (moderate).

Wave height, next 7 days

2.04.06.0 ft 6.0 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 common2.5 ft
Significant4.9 ft
Highest expected9.9 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 9.9 ft. Before heading out, expect waves of up to 9.9 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	1.6 ft–4.1 ft
4	Moderate · today	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	5.2 ft	Moderate	ESE	9 s	4.2 ft ESE	11 mph NE
Fri 30	5.2 ft	Moderate	ESE	9 s	4.7 ft E	15 mph NNE
Sat 31	5.7 ft	Moderate	E	9 s	4.9 ft E	16 mph NNE
Sun 1	6.0 ft	Moderate	ESE	10 s	5.1 ft E	13 mph NE
Mon 2	5.7 ft	Moderate	SE	10 s	4.5 ft E	9 mph NNE
Tue 3	5.4 ft	Moderate	SE	10 s	4.1 ft ESE	10 mph ENE
Wed 4	4.8 ft	Moderate	SSE	10 s	3.4 ft SSW	9 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	5.2 ft	5.2 ft	5.2 ft	5.1 ft	5.1 ft	4.9 ft	4.8 ft	4.7 ft
Period	8.4 s	8.3 s	8.1 s	8.1 s	8.2 s	8.3 s	8.5 s	8.6 s
Direction	SE	SE	ESE	ESE	ESE	ESE	ESE	ESE
Swell	3.9 ft · 6 s	4.0 ft · 6 s	4.1 ft · 6 s	4.1 ft · 6 s	4.2 ft · 6 s	4.1 ft · 6 s	3.9 ft · 6 s	3.9 ft · 6 s
Wind (mph)	5 ENE	6 NE	10 NE	11 NNE	10 NE	11 NE	9 NNE	7 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	5.9 ft SE	9 s	4.3 ft ESE
Tue 27	7.2 ft SSE	10 s	6.2 ft S
Mon 26	8.5 ft S	11 s	6.9 ft SSW
Sun 25	4.3 ft SE	10 s	3.0 ft ESE
Sat 24	3.6 ft ESE	8 s	3.0 ft E
Fri 23	4.3 ft ESE	9 s	3.0 ft E
Thu 22	5.2 ft SE	10 s	3.6 ft SSE

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	5.9 ft SE	10 s	4.6 ft ESE
Tue 20	5.9 ft ESE	10 s	4.6 ft E
Mon 19	5.9 ft ESE	9 s	5.2 ft E
Sun 18	6.9 ft SE	8 s	5.6 ft ESE
Sat 17	7.5 ft SE	9 s	5.9 ft ESE
Fri 16	7.2 ft ESE	8 s	5.9 ft ESE
Thu 15	7.5 ft ESE	8 s	6.2 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 Grand SableQuestions

How are the waves today in Grand Sable?

Moderate (4.9 ft with a period of 8.3 s from the east-southeast). The highest wave to expect is around 9.9 ft.

Which day will have the biggest waves this week?

Sunday 1, with waves up to 6.0 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 9.9 ft.

More about Grand Sable today

Waves near Grand Sable

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 4.6 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 2:54 pm (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from