Onset Sea Conditions and Tide Table

Onset Sea Conditions table showing wave height, swell direction and period.

High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at 07:05 AM and sunset is at 04:15 PM.

Days 1–3 Weather Summary

A dusting of snow turning to light rain (total 4mm) on Tue afternoon. Icy conditions (max 3°C on Tue afternoon, min -5°C on Sun night). Winds increasing (light winds from the SSW on Tue morning, fresh winds from the NW by Wed morning).

Days 4–6 Weather Summary

A dusting of new snow. Icy conditions (max 3°C on Thu morning, min -4°C on Thu night). Wind will be generally light.

Days 7–9 Weather Summary

Moderate rain (total 11mm), heaviest on Sun afternoon. Freeze-thaw conditions (max 7°C on Sun afternoon, min -9°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the WNW by Sun night).

Days 10–12 Weather Summary

Mostly dry. Freeze-thaw conditions (max 1°C on Fri afternoon, min -8°C on Tue night). Mainly fresh winds.

Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Fri
2
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
Wave Height Map
High Tide
9:34AM1.09m
9:58PM0.93m
10:14AM1.07m
10:42PM0.93m
10:58AM1.05m
11:28PM0.94m
11:45AM1.02m
00:16AM0.97m
12:35PM0.99m
1:07AM1.01m
1:28PM0.97m
2:01AM1.07m
2:25PM0.94m
2:59AM1.13m
3:28PM0.94m
4:02AM1.19m
4:34PM0.96m
5:08AM1.26m
5:38PM1.01m
6:10AM1.34m
6:37PM1.09m
7:07AM1.40m
Low Tide
4:18PM0.02m
4:04AM0.02m
4:51PM0.02m
4:43AM0.04m
5:26PM0.02m
5:27AM0.07m
6:04PM0.02m
6:17AM0.10m
6:48PM0.02m
7:18AM0.12m
7:40PM0.01m
8:37AM0.12m
8:40PM-0.01m
10:05AM0.09m
9:43PM-0.04m
11:17AM0.04m
10:43PM-0.08m
12:19PM-0.02m
11:41PM-0.11m
1:18PM-0.06m
00:38AM-0.15m
2:13PM-0.10m
Wave
height (m) 
direction
period (s) 
0.6
NW
4
0.4
NW
3
0.4
W
3
0.3
WSW
2
0.3
SSE
2
0.5
W
3
0.9
WNW
4
0.9
N
4
0.5
E
9
0.6
E
10
0.9
WSW
4
0.6
NW
3
0.5
N
3
0.8
ENE
4
1.2
ENE
5
1.1
NE
5
0.8
ENE
4
0.5
E
8
0.6
SE
3
0.9
SSE
5
1.2
WNW
4
1.3
W
5
1.2
W
4
1.1
W
4
1.2
W
4
0.9
WNW
4
0.7
WNW
4
0.4
NW
3
0.3
WNW
3
0.5
W
3
0.9
NW
4
1
W
4
0.6
WNW
4
0.4
WNW
3
0.3
NW
2
clear
clear
cloud
cloud
light snow
rain showers
part cloud
cloud
part cloud
cloud
part cloud
part cloud
cloud
light snow
light snow
part cloud
cloud
part cloud
cloud
heavy rain
clear
clear
part cloud
part cloud
cloud
clear
clear
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
cloudy
cloudy
light snow
rain shwrs
some clouds
cloudy
some clouds
cloudy
some clouds
some clouds
cloudy
light snow
light snow
some clouds
cloudy
some clouds
cloudy
heavy rain
clear
clear
some clouds
some clouds
cloudy
clear
clear
cloudy
some clouds
some clouds
clear
clear
clear
clear
clear
 km/h
25
NW
10
WNW
10
W
15
WSW
10
SE
15
W
35
NW
20
N
10
WNW
20
WSW
15
W
20
NW
15
NNE
20
ENE
25
NE
25
NE
15
NNE
0
E
20
SSE
25
SSW
35
WNW
30
W
30
W
25
W
30
W
25
WNW
20
WNW
15
NW
15
WNW
15
W
25
WNW
25
W
15
WNW
20
NW
10
WNW
 mm 
3
1
11
max°C
-2
0
1
1
3
3
3
1
-1
3
3
0
-2
-3
-1
-1
-1
0
4
7
3
-5
-6
-6
-5
-6
-7
-4
-3
-2
-1
-1
-3
0
1
Moonrise
9:17
9:48
10:13
10:36
10:57
11:18
11:40
12:07
12:39
1:20
2:14
3:20
Moonset
6:37
7:45
8:53
10:01
11:09
12:20
1:34
2:52
4:12
5:32
6:43
Sunrise
7:05
7:07
7:07
7:07
7:07
7:07
7:09
7:09
7:09
7:09
7:09
7:09
Sunset
4:15
4:15
4:15
4:16
4:17
4:17
4:19
4:20
4:20
4:21
4:22
4:22
Today's sea temperature in Onset is
5.3° C
(Statistics for 22 Dec 1981-2005 – mean: 7.7 max: 9.4 min: 6.2°C)
Issued (local time): 12 am Monday 22 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest