Waves in Harbour Breton

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 6:53 am (GMT-2:30)

Now · significant height 3.9 ft

Sea state: Slight · Douglas 3
Period: 5.3 s · WSW
Swell: 1.2 ft · 7 s
Highest expected: 8.0 ft

Today the sea at Harbour Breton is slight: 3.9 ft waves with a period of 5.3 s from the west-southwest. The swell, 1.2 ft at 7 s, comes from the west-southwest. Biggest waves: Monday 2, with waves up to 5.3 ft (moderate).

Wave height, next 7 days

2.04.06.0 ft 5.3 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 common1.9 ft
Significant3.9 ft
Highest expected8.0 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 8.0 ft. Before heading out, expect waves of up to 8.0 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	4.4 ft	Moderate	WSW	6 s	1.7 ft SW	22 mph W
Fri 30	4.4 ft	Moderate	SW	6 s	2.5 ft SW	21 mph WSW
Sat 31	2.4 ft	Slight	WSW	6 s	2.3 ft SW	11 mph N
Sun 1	3.5 ft	Slight	W	5 s	1.4 ft WSW	18 mph NW
Mon 2	5.3 ft	Moderate	WSW	6 s	2.4 ft SW	25 mph WSW
Tue 3	4.1 ft	Moderate	WSW	6 s	2.9 ft WSW	22 mph WNW
Wed 4	2.9 ft	Slight	SSW	5 s	1.3 ft SW	11 mph NNW

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	4.2 ft	4.2 ft	3.9 ft	3.5 ft	3.6 ft	3.6 ft	3.4 ft	2.9 ft
Period	5.4 s	5.5 s	5.4 s	5.1 s	4.9 s	4.8 s	4.8 s	4.8 s
Direction	W	W	W	WSW	WSW	WSW	WSW	WSW
Swell	1.2 ft · 7 s	1.4 ft · 7 s	1.3 ft · 7 s	1.3 ft · 6 s	0.7 ft · 5 s	0.5 ft · 5 s	0.8 ft · 5 s	1.4 ft · 5 s
Wind (mph)	22 WNW	19 WNW	17 W	17 W	19 W	20 W	19 WSW	14 WSW

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	3.9 ft W	5 s	1.6 ft WSW
Tue 27	3.0 ft W	5 s	2.0 ft SW
Mon 26	2.6 ft WSW	4 s	1.6 ft SW
Sun 25	2.0 ft WSW	4 s	1.0 ft WSW
Sat 24	3.0 ft NNE	4 s	1.0 ft SSW
Fri 23	4.3 ft NE	5 s	1.0 ft SSW
Thu 22	1.0 ft SSW	8 s	0.7 ft SSW

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	1.0 ft WSW	5 s	1.0 ft WSW
Tue 20	3.0 ft SW	5 s	2.3 ft SW
Mon 19	3.0 ft WSW	6 s	2.0 ft WSW
Sun 18	3.9 ft WSW	6 s	2.3 ft SW
Sat 17	5.6 ft SW	6 s	2.6 ft SW
Fri 16	3.9 ft W	6 s	2.6 ft WSW
Thu 15	4.6 ft SSW	6 s	3.3 ft SSW

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 Harbour BretonQuestions

How are the waves today in Harbour Breton?

Slight (3.9 ft with a period of 5.3 s from the west-southwest). The highest wave to expect is around 8.0 ft.

Which day will have the biggest waves this week?

Monday 2, with waves up to 5.3 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 8.0 ft.

More about Harbour Breton today

Waves near Harbour Breton

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 4.1 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 6:53 am (local time).

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