Waves in Southern Harbour

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 12:28 am (GMT-2:30)

Now · significant height 1.6 ft

Sea state: Smooth · Douglas 2
Period: 3.0 s · W
Swell: 0.4 ft · 5 s
Highest expected: 3.4 ft

Today the sea at Southern Harbour is smooth: 1.6 ft waves with a period of 3.0 s from the west. The swell, 0.4 ft at 5 s, comes from the southwest. Biggest waves: Friday 30, with waves up to 3.4 ft (slight).

Wave height, next 7 days

1.02.03.0 ft 3.4 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 common0.8 ft
Significant1.6 ft
Highest expected3.4 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 3.4 ft. Before heading out, expect waves of up to 3.4 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 · today	0.3 ft–1.6 ft
3	Slight · week peak	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	2.2 ft	Slight	WSW	4 s	0.7 ft SW	15 mph WSW
Fri 30	3.4 ft	Slight	SW	4 s	0.9 ft SSW	20 mph SW
Sat 31	1.8 ft	Slight	SSW	5 s	1.0 ft SSW	17 mph NNE
Sun 1	2.1 ft	Slight	NW	3 s	0.5 ft SSW	19 mph WNW
Mon 2	3.4 ft	Slight	SW	4 s	0.8 ft SSW	20 mph SW
Tue 3	2.2 ft	Slight	WSW	4 s	0.7 ft SW	16 mph W
Wed 4	2.1 ft	Slight	SSW	5 s	0.4 ft SSW	18 mph S

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	1.6 ft	1.8 ft	1.8 ft	1.6 ft	1.8 ft	2.0 ft	2.2 ft	2.0 ft
Period	3.0 s	3.1 s	3.1 s	3.3 s	3.2 s	3.3 s	3.5 s	3.5 s
Direction	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW
Swell	0.4 ft · 5 s	0.3 ft · 5 s	0.5 ft · 5 s	0.6 ft · 5 s	0.6 ft · 5 s	0.5 ft · 5 s	0.6 ft · 5 s	0.7 ft · 5 s
Wind (mph)	12 WSW	15 WSW	15 WSW	11 WSW	13 WSW	14 WSW	15 WSW	15 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	2.0 ft WNW	3 s	0.3 ft WSW
Tue 27	2.6 ft W	4 s	1.0 ft SSW
Mon 26	2.3 ft SW	4 s	0.7 ft SSW
Sun 25	1.3 ft WNW	4 s	0.3 ft WNW
Sat 24	4.6 ft NE	4 s	0.7 ft SSE
Fri 23	5.6 ft NE	5 s	0.3 ft SSW
Thu 22	0.7 ft S	5 s	0.7 ft S

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	1.0 ft NE	6 s	0.3 ft S
Tue 20	3.0 ft SW	4 s	1.0 ft SSW
Mon 19	2.6 ft WSW	5 s	0.7 ft SW
Sun 18	2.6 ft W	5 s	1.0 ft SSW
Sat 17	4.6 ft SW	5 s	1.3 ft SSW
Fri 16	3.0 ft WNW	4 s	1.0 ft WSW
Thu 15	3.0 ft SSW	5 s	1.3 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 Southern HarbourQuestions

How are the waves today in Southern Harbour?

Smooth (1.6 ft with a period of 3.0 s from the west). The highest wave to expect is around 3.4 ft.

Which day will have the biggest waves this week?

Friday 30, with waves up to 3.4 ft (slight).

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 3.4 ft.

More about Southern Harbour today

Waves near Southern Harbour

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 0.6 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 12:28 am (local time).

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