TidePlanet

Waves in Saint Peters

Hourly wave forecast for 7 days · updated today, Thursday, October 29, at 2:42 am (GMT)
Now · significant height 0.5 ft
Sea state
Smooth · Douglas 2
Period
3.5 s · SSW
Swell
0.4 ft · 2 s
Highest expected
1.0 ft

Today the sea at Saint Peters is smooth: 0.5 ft waves with a period of 3.5 s from the south-southwest. The swell, 0.4 ft at 2 s, comes from the south-southwest. Biggest waves: Monday 2, with waves up to 4.4 ft (moderate).

Wave height, next 7 days

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
  • Significant0.5 ft
  • Highest expected1.0 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 1.0 ft. Before heading out, expect waves of up to 1.0 ft.

The Douglas sea state scale

DegreeNameWave 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 0.7 ft Smooth SSW 4 s 0.4 ft SW 9 mph SE
Fri 30 1.8 ft Slight E 3 s 0.7 ft ENE 14 mph ESE
Sat 31 1.8 ft Slight E 3 s 1.2 ft ENE 13 mph E
Sun 1 3.4 ft Slight NNE 4 s 1.0 ft ENE 12 mph NNW
Mon 2 4.4 ft Moderate NE 6 s 1.4 ft NE 17 mph NNE
Tue 3 4.3 ft Moderate NE 6 s 1.9 ft NE 15 mph NE
Wed 4 3.5 ft Slight NE 5 s 2.6 ft NE 11 mph ENE

Today, every 3 hours

Time 12:00 am3:00 am6:00 am9:00 am12:00 pm3:00 pm6:00 pm9:00 pm
Waves 0.7 ft0.5 ft0.4 ft0.3 ft0.3 ft0.2 ft0.1 ft0.2 ft
Period 3.4 s3.5 s3.6 s3.7 s3.8 s4.0 s3.8 s3.0 s
Direction SSWSSWSWSWSWSWSWSSW
Swell 0.4 ft · 3 s0.4 ft · 2 s0.3 ft · 2 s0.1 ft · 4 s0.1 ft · 6 s0.1 ft · 6 s0.1 ft · 5 s0.1 ft · 5 s
Wind (mph) 5 W5 SW5 WNW2 N5 SE4 E6 E9 ESE

Previous days

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

DayMax wavePeriodSwell
Wed 28 1.3 ft SW4 s0.7 ft SW
Tue 27 4.3 ft SSW5 s2.0 ft SSW
Mon 26 3.6 ft SSW5 s1.0 ft SSW
Sun 25 4.9 ft SW6 s2.6 ft SSW
Sat 24 5.9 ft SW6 s1.6 ft SW
Fri 23 6.2 ft SW6 s3.0 ft SSW
Thu 22 2.6 ft SW5 s1.0 ft SSW
Show all 14 days
DayMax wavePeriodSwell
Wed 21 3.9 ft SSW5 s2.0 ft SSE
Tue 20 3.3 ft E5 s2.3 ft NE
Mon 19 2.6 ft NE6 s2.6 ft NE
Sun 18 4.6 ft NE6 s3.3 ft NE
Sat 17 4.3 ft NNE5 s1.3 ft NE
Fri 16 2.6 ft NW4 s1.3 ft SSW
Thu 15 2.0 ft SSW3 s1.0 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 Saint PetersQuestions

How are the waves today in Saint Peters?

Smooth (0.5 ft with a period of 3.5 s from the south-southwest). The highest wave to expect is around 1.0 ft.

Which day will have the biggest waves this week?

Monday 2, with waves up to 4.4 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 1.0 ft.

More about Saint Peters today

Waves near Saint Peters

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 1.9 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 2:42 am (local time).

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