Waves in Markham

Hourly wave forecast for 7 days · updated today, Wednesday, October 28, at 4:28 pm (PDT)

Now · significant height 5.8 ft

Sea state: Moderate · Douglas 4
Period: 9.2 s · W
Swell: 5.7 ft · 8 s
Highest expected: 12 ft

Today the sea at Markham is moderate: 5.8 ft waves with a period of 9.2 s from the west. The swell, 5.7 ft at 8 s, comes from the west-northwest. Biggest waves: Monday 2, with waves up to 6.6 ft (moderate).

Wave height, next 7 days

2.04.06.0 ft 6.6 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 common2.9 ft
Significant5.8 ft
Highest expected12 ft

One wave in seven is higher than the significant height, and about 3 times a day one reaches 12 ft. Before heading out, expect waves of up to 12 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	5.9 ft	Moderate	W	9 s	5.8 ft WNW	12 mph WSW
Thu 29	5.6 ft	Moderate	W	9 s	5.3 ft W	11 mph SSE
Fri 30	3.4 ft	Slight	WSW	10 s	2.8 ft WSW	9 mph SE
Sat 31	3.0 ft	Slight	WSW	12 s	1.6 ft SW	8 mph ESE
Sun 1	4.8 ft	Moderate	W	18 s	4.4 ft W	5 mph SE
Mon 2	6.6 ft	Moderate	W	18 s	6.2 ft WNW	8 mph E
Tue 3	6.4 ft	Moderate	W	14 s	6.2 ft W	6 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	4.9 ft	5.3 ft	5.6 ft	5.8 ft	5.9 ft	5.9 ft	5.8 ft	5.7 ft
Period	8.2 s	8.1 s	8.3 s	8.5 s	8.9 s	9.2 s	9.3 s	9.3 s
Direction	W	W	W	W	W	W	W	W
Swell	4.0 ft · 6 s	4.5 ft · 6 s	5.0 ft · 6 s	5.4 ft · 6 s	5.6 ft · 7 s	5.8 ft · 8 s	5.6 ft · 8 s	5.5 ft · 8 s
Wind (mph)	12 W	3 WSW	10 W	7 WSW	6 WSW	10 WSW	6 W	7 SSW

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	4.9 ft W	11 s	3.9 ft W
Mon 26	4.9 ft WSW	10 s	3.6 ft W
Sun 25	6.6 ft WSW	9 s	5.9 ft W
Sat 24	4.9 ft WNW	10 s	4.6 ft WNW
Fri 23	6.2 ft WNW	10 s	5.9 ft WNW
Thu 22	6.2 ft WNW	11 s	5.9 ft WNW
Wed 21	3.6 ft W	11 s	3.3 ft WNW

Show all 14 days

Day	Max wave	Period	Swell
Tue 20	4.6 ft W	11 s	4.3 ft W
Mon 19	5.6 ft W	12 s	5.2 ft W
Sun 18	5.9 ft W	12 s	5.9 ft W
Sat 17	5.6 ft W	11 s	5.6 ft W
Fri 16	4.9 ft W	12 s	4.3 ft W
Thu 15	3.9 ft W	11 s	3.6 ft W
Wed 14	4.3 ft W	12 s	3.9 ft W

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 MarkhamQuestions

How are the waves today in Markham?

Moderate (5.8 ft with a period of 9.2 s from the west). The highest wave to expect is around 12 ft.

Which day will have the biggest waves this week?

Monday 2, with waves up to 6.6 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 12 ft.

More about Markham today

Waves near Markham

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 3.0 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 4:28 pm (local time).

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