Waves in Union

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 7:28 am (GMT+8)

Now · significant height 0.3 ft

Sea state: Calm (rippled) · Douglas 1
Period: 2.6 s · ENE
Swell: 0.3 ft · 2 s
Highest expected: 0.7 ft

Today the sea at Union is calm (rippled): 0.3 ft waves with a period of 2.6 s from the east-northeast. The swell, 0.3 ft at 2 s, comes from the east.

Wave height, next 7 days

1.02.03.0 ft 0.5 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 common0.2 ft
Significant0.3 ft
Highest expected0.7 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 0.7 ft. Before heading out, expect waves of up to 0.7 ft.

The Douglas sea state scale

Degree	Name	Wave height
0	Calm (glassy)	0
1	Calm (rippled) · today	0.0 ft–0.3 ft
2	Smooth · week peak	0.3 ft–1.6 ft
3	Slight	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	0.5 ft	Smooth	ENE	3 s	0.5 ft E	8 mph E
Fri 30	0.5 ft	Smooth	NE	3 s	0.5 ft NE	5 mph ESE
Sat 31	0.1 ft	Calm (rippled)	NNE	3 s	0.1 ft N	5 mph SSW
Sun 1	0.1 ft	Calm (rippled)	NE	3 s	0.1 ft NE	5 mph ESE
Mon 2	0.1 ft	Calm (rippled)	ENE	4 s	0.1 ft ENE	4 mph ENE
Tue 3	0.3 ft	Calm (rippled)	ENE	2 s	0.2 ft E	7 mph ENE
Wed 4	0.1 ft	Calm (rippled)	NE	3 s	0.1 ft NE	7 mph E

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	0.1 ft	0.2 ft	0.3 ft	0.3 ft	0.3 ft	0.3 ft	0.3 ft	0.3 ft
Period	2.5 s	2.4 s	2.6 s	2.6 s	2.7 s	2.6 s	2.4 s	2.1 s
Direction	NNE	NE	ENE	ENE	E	E	E	ENE
Swell	0.1 ft · 2 s	0.1 ft · 2 s	0.2 ft · 2 s	0.3 ft · 2 s	0.3 ft · 2 s	0.2 ft · 2 s	0.1 ft · 2 s	0.3 ft · 2 s
Wind (mph)	1 SE	1 E	4 E	8 E	6 E	3 NE	2 NNW	1 SSE

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	0.3 ft N	4 s	0.3 ft NNW
Tue 27	0.7 ft NE	4 s	0.3 ft NNE
Mon 26	0.7 ft ENE	3 s	0.3 ft NE
Sun 25	0.0 ft E	5 s	0.0 ft ENE
Sat 24	0.3 ft SSE	3 s	0.3 ft SSE
Fri 23	1.0 ft SSW	3 s	0.3 ft SSW
Thu 22	1.3 ft SW	3 s	0.3 ft SW

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	0.7 ft NNW	3 s	0.7 ft NNW
Tue 20	1.0 ft NNW	3 s	0.7 ft N
Mon 19	0.0 ft N	3 s	0.0 ft N
Sun 18	0.3 ft ENE	3 s	0.3 ft ENE
Sat 17	0.3 ft NNE	3 s	0.3 ft NNE
Fri 16	0.3 ft NNW	3 s	0.3 ft NNW
Thu 15	0.0 ft N	3 s	0.0 ft N

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 UnionQuestions

How are the waves today in Union?

Calm (rippled) (0.3 ft with a period of 2.6 s from the east-northeast). The highest wave to expect is around 0.7 ft.

Which day will have the biggest waves this week?

Thursday 29, with waves up to 0.5 ft (smooth).

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 0.7 ft.

More about Union today

Waves near Union

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 12 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 7:28 am (local time).

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