Waves in Janela

Hourly wave forecast for 7 days · updated today, Wednesday, October 28, at 10:30 pm (GMT-1)

Now · significant height 4.4 ft

Sea state: Moderate · Douglas 4
Period: 10.1 s · N
Swell: 3.2 ft · 10 s
Highest expected: 8.7 ft

Today the sea at Janela is moderate: 4.4 ft waves with a period of 10.1 s from the north. The swell, 3.2 ft at 10 s, comes from the north-northwest. Biggest waves: Thursday 29, 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 common2.2 ft
Significant4.4 ft
Highest expected8.7 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 8.7 ft. Before heading out, expect waves of up to 8.7 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	4.8 ft	Moderate	NNE	10 s	4.4 ft NNE	14 mph N
Thu 29	4.9 ft	Moderate	N	10 s	3.6 ft NNW	14 mph N
Fri 30	4.5 ft	Moderate	N	9 s	3.4 ft NNW	14 mph N
Sat 31	3.9 ft	Slight	NNE	9 s	2.6 ft N	16 mph NNE
Sun 1	4.1 ft	Moderate	N	11 s	3.9 ft NNW	12 mph NE
Mon 2	4.7 ft	Moderate	NNW	11 s	4.2 ft NNW	14 mph NE
Tue 3	4.5 ft	Moderate	N	11 s	3.9 ft N	12 mph NNE

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	4.8 ft	4.7 ft	4.5 ft	4.3 ft	4.2 ft	4.1 ft	4.2 ft	4.3 ft
Period	7.5 s	7.6 s	7.9 s	8.2 s	8.7 s	9.3 s	9.9 s	10.2 s
Direction	NNE	NNE	NNE	NNE	NNE	N	N	N
Swell	4.3 ft · 6 s	4.3 ft · 6 s	3.9 ft · 6 s	3.5 ft · 5 s	3.4 ft · 5 s	3.0 ft · 5 s	3.1 ft · 6 s	3.1 ft · 10 s
Wind (mph)	14 N	12 N	12 N	11 N	9 NNE	10 NNE	10 NNE	14 N

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	5.6 ft NNE	8 s	4.9 ft NNE
Mon 26	5.9 ft NNE	8 s	5.9 ft NNE
Sun 25	6.9 ft NNE	8 s	6.2 ft NE
Sat 24	5.9 ft NNE	8 s	4.9 ft N
Fri 23	4.9 ft NNE	7 s	3.6 ft NE
Thu 22	4.3 ft NNE	9 s	3.3 ft NNE
Wed 21	4.6 ft N	13 s	3.9 ft NNW

Show all 14 days

Day	Max wave	Period	Swell
Tue 20	4.3 ft N	13 s	3.9 ft N
Mon 19	4.9 ft NNE	9 s	4.3 ft NNE
Sun 18	3.9 ft N	12 s	3.3 ft NNW
Sat 17	3.9 ft N	12 s	3.3 ft NNW
Fri 16	3.9 ft N	11 s	3.0 ft NNW
Thu 15	4.3 ft NNE	10 s	3.6 ft NNE
Wed 14	4.3 ft NE	7 s	3.9 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 JanelaQuestions

How are the waves today in Janela?

Moderate (4.4 ft with a period of 10.1 s from the north). The highest wave to expect is around 8.7 ft.

Which day will have the biggest waves this week?

Thursday 29, 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 8.7 ft.

More about Janela today

Waves near Janela

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 7.4 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 10:30 pm (local time).

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