Waves in San Telmo

Hourly wave forecast for 7 days · updated today, Wednesday, October 28, at 11:53 pm (CET)

Now · significant height 1.6 ft

Sea state: Smooth · Douglas 2
Period: 5.1 s · NNE
Swell: 1.4 ft · 5 s
Highest expected: 3.4 ft

Today the sea at San Telmo is smooth: 1.6 ft waves with a period of 5.1 s from the north-northeast. The swell, 1.4 ft at 5 s, comes from the north-northeast. Biggest waves: Monday 2, with waves up to 4.9 ft (moderate).

Wave height, next 7 days

1.02.03.04.05.0 ft 4.9 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	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	2.0 ft	Slight	NNE	5 s	1.5 ft NNE	19 mph NE
Thu 29	1.6 ft	Smooth	NNE	5 s	1.4 ft NNE	10 mph SW
Fri 30	1.4 ft	Smooth	NNE	5 s	1.0 ft NNE	13 mph NE
Sat 31	3.0 ft	Slight	NNE	5 s	2.1 ft NNE	5 mph NE
Sun 1	3.2 ft	Slight	NNE	5 s	2.4 ft NNE	9 mph NW
Mon 2	4.9 ft	Moderate	NNE	7 s	4.6 ft NNE	20 mph ENE
Tue 3	4.1 ft	Slight	NNE	6 s	3.3 ft NNE	21 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	0.5 ft	0.5 ft	0.7 ft	1.2 ft	1.8 ft	1.9 ft	1.8 ft	1.8 ft
Period	3.0 s	2.8 s	2.8 s	2.9 s	3.4 s	3.8 s	4.3 s	4.8 s
Direction	SW	WSW	NNW	NE	NE	NNE	NNE	NNE
Swell	0.4 ft · 2 s	0.4 ft · 3 s	0.5 ft · 2 s	0.5 ft · 3 s	0.5 ft · 4 s	1.0 ft · 4 s	1.4 ft · 4 s	1.5 ft · 4 s
Wind (mph)	3 NE	4 E	10 NE	14 NE	15 NE	15 NE	9 NE	4 ENE

Previous days

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

Day	Max wave	Period	Swell
Tue 27	1.6 ft WNW	5 s	1.3 ft WSW
Mon 26	2.3 ft W	6 s	1.6 ft SW
Sun 25	2.6 ft W	5 s	2.0 ft WSW
Sat 24	5.9 ft NNW	6 s	3.9 ft NNW
Fri 23	5.2 ft W	6 s	3.6 ft W
Thu 22	3.6 ft NNW	6 s	2.6 ft N
Wed 21	3.9 ft W	6 s	2.6 ft SSW

Show all 14 days

Day	Max wave	Period	Swell
Tue 20	3.6 ft N	6 s	2.6 ft N
Mon 19	7.5 ft NNE	7 s	5.6 ft NNE
Sun 18	6.6 ft NE	7 s	3.9 ft NNE
Sat 17	1.0 ft ENE	5 s	1.0 ft E
Fri 16	0.3 ft E	4 s	0.3 ft ENE
Thu 15	1.0 ft NE	5 s	0.7 ft NNE
Wed 14	0.7 ft NE	6 s	0.7 ft NE

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 San TelmoQuestions

How are the waves today in San Telmo?

Smooth (1.6 ft with a period of 5.1 s from the north-northeast). The highest wave to expect is around 3.4 ft.

Which day will have the biggest waves this week?

Monday 2, with waves up to 4.9 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 3.4 ft.

More about San Telmo today

Waves near San Telmo

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 3.4 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 11:53 pm (local time).

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