Waves in Castine

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 12:47 am (EDT)

Now · significant height 0.7 ft

Sea state: Smooth · Douglas 2
Period: 3.2 s · SSW
Swell: 0.5 ft · 2 s
Highest expected: 1.4 ft

Today the sea at Castine is smooth: 0.7 ft waves with a period of 3.2 s from the south-southwest. The swell, 0.5 ft at 2 s, comes from the south-southwest. Biggest waves: Wednesday 4, with waves up to 2.7 ft (slight).

Wave height, next 7 days

1.02.03.0 ft 2.7 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 common0.3 ft
Significant0.7 ft
Highest expected1.4 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 1.4 ft. Before heading out, expect waves of up to 1.4 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	2.1 ft	Slight	SSW	4 s	1.2 ft S	17 mph SSW
Fri 30	2.0 ft	Slight	SW	5 s	1.4 ft SSW	14 mph W
Sat 31	1.0 ft	Smooth	NW	3 s	0.5 ft S	13 mph NW
Sun 1	0.8 ft	Smooth	SW	6 s	0.7 ft SSW	9 mph WSW
Mon 2	1.0 ft	Smooth	SSW	3 s	0.7 ft SSW	8 mph WSW
Tue 3	1.0 ft	Smooth	S	4 s	0.7 ft S	7 mph NNE
Wed 4	2.7 ft	Slight	SSW	5 s	1.6 ft S	9 mph SSW

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	0.7 ft	0.7 ft	0.7 ft	0.9 ft	1.2 ft	1.6 ft	2.0 ft	2.0 ft
Period	3.1 s	3.3 s	3.3 s	3.5 s	3.7 s	3.7 s	3.9 s	4.1 s
Direction	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW
Swell	0.5 ft · 2 s	0.5 ft · 2 s	0.5 ft · 3 s	0.8 ft · 3 s	0.9 ft · 4 s	0.9 ft · 4 s	1.0 ft · 4 s	1.2 ft · 4 s
Wind (mph)	8 SW	9 SW	9 SW	10 SSW	11 SSW	17 SSW	15 SSW	12 SSW

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	0.7 ft S	8 s	0.3 ft SSE
Tue 27	0.7 ft NNW	6 s	0.3 ft SSE
Mon 26	1.0 ft SSW	4 s	0.7 ft SSW
Sun 25	0.7 ft SSW	6 s	0.7 ft S
Sat 24	0.3 ft ESE	6 s	0.0 ft SE
Fri 23	1.3 ft N	5 s	0.3 ft SSE
Thu 22	1.3 ft NE	7 s	0.3 ft SE

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	1.0 ft E	7 s	0.3 ft SE
Tue 20	1.0 ft ESE	6 s	0.3 ft SE
Mon 19	0.7 ft S	4 s	0.7 ft SSW
Sun 18	1.0 ft SSW	8 s	0.7 ft S
Sat 17	1.6 ft W	4 s	1.3 ft S
Fri 16	2.0 ft S	7 s	1.6 ft S
Thu 15	1.3 ft W	6 s	0.7 ft S

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 CastineQuestions

How are the waves today in Castine?

Smooth (0.7 ft with a period of 3.2 s from the south-southwest). The highest wave to expect is around 1.4 ft.

Which day will have the biggest waves this week?

Wednesday 4, with waves up to 2.7 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 1.4 ft.

More about Castine today

Waves near Castine

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 1.0 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 12:47 am (local time).

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