Waves in Port Arthur

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 3:09 pm (GMT+11)

Now · significant height 12 ft

Sea state: Rough · Douglas 5
Period: 11.5 s · SSW
Swell: 11 ft · 10 s
Highest expected: 23 ft

Waves up to 14 ft today

Today the sea at Port Arthur is rough: 12 ft waves with a period of 11.5 s from the south-southwest. The swell, 11 ft at 10 s, comes from the south-southwest.

Wave height, next 7 days

5.01015 ft 14 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 common5.9 ft
Significant12 ft
Highest expected23 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 23 ft. Before heading out, expect waves of up to 23 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	4.1 ft–8.2 ft
5	Rough · today	8.2 ft–13.1 ft
6	Very rough · week peak	13.1 ft–19.7 ft
7	High	19.7 ft–29.5 ft
8	Very high	29.5 ft–45.9 ft

Waves day by day

Day	Max wave	Sea state	Direction	Max period	Swell	Max wind
Today	14 ft	Very rough	SSW	12 s	13 ft SSW	22 mph W
Fri 30	11 ft	Rough	SSW	11 s	11 ft SSW	16 mph SW
Sat 31	6.6 ft	Moderate	SSW	10 s	6.6 ft SSW	26 mph NNW
Sun 1	6.8 ft	Moderate	SW	9 s	6.0 ft SSW	18 mph WSW
Mon 2	7.3 ft	Moderate	SW	12 s	7.3 ft SW	11 mph NW
Tue 3	6.6 ft	Moderate	SW	12 s	6.4 ft SW	12 mph ESE
Wed 4	4.6 ft	Moderate	SW	10 s	3.7 ft SW	19 mph W

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	14 ft	14 ft	14 ft	13 ft	12 ft	12 ft	12 ft	12 ft
Period	11.2 s	11.3 s	11.4 s	11.5 s	11.5 s	11.5 s	11.4 s	11.3 s
Direction	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW
Swell	12 ft · 10 s	13 ft · 10 s	13 ft · 10 s	13 ft · 10 s	12 ft · 10 s	11 ft · 10 s	11 ft · 10 s	11 ft · 10 s
Wind (mph)	20 WSW	18 WSW	17 W	19 WNW	22 W	21 W	19 W	17 W

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	14 ft SW	11 s	12 ft SSW
Tue 27	7.2 ft SW	10 s	6.2 ft SW
Mon 26	5.9 ft SW	9 s	4.3 ft SSW
Sun 25	6.2 ft SSW	10 s	5.2 ft SW
Sat 24	7.5 ft SSW	12 s	5.9 ft SW
Fri 23	6.2 ft SW	12 s	5.6 ft SW
Thu 22	5.9 ft SW	12 s	5.6 ft SW

Show all 14 days

Day	Max wave	Period	Swell
Wed 21	5.6 ft SSW	11 s	4.3 ft SW
Tue 20	4.9 ft S	10 s	3.9 ft SSW
Mon 19	5.2 ft SSW	10 s	3.9 ft SW
Sun 18	4.3 ft S	10 s	3.3 ft SSW
Sat 17	4.3 ft S	10 s	3.3 ft SSW
Fri 16	5.2 ft S	10 s	4.3 ft SSW
Thu 15	6.6 ft SSW	9 s	5.2 ft SW

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 Port ArthurQuestions

How are the waves today in Port Arthur?

Rough (12 ft with a period of 11.5 s from the south-southwest). The highest wave to expect is around 23 ft.

Which day will have the biggest waves this week?

Thursday 29, with waves up to 14 ft (very rough).

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 23 ft.

More about Port Arthur today

Waves near Port Arthur

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 4.6 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 3:09 pm (local time).

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