Half Moon Bay Sea Conditions and Tide Table

Half Moon Bay 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 06:18 AM and sunset is at 07:55 PM.

Days 1–3 Weather Summary

Mostly dry. Cool air temperatures (max 13°C on Mon afternoon, min 9°C on Mon night). Wind will be generally light.

Days 4–6 Weather Summary

Some drizzle, heaviest during Sat morning. Cool air temperatures (max 12°C on Thu afternoon, min 9°C on Thu night). Winds increasing (calm on Fri night, near gales from the NW by Sat night).

Days 7–9 Weather Summary

Mostly dry. Very mild (max 14°C on Mon afternoon, min 9°C on Sun night). Mainly strong winds.

Days 10–12 Weather Summary

Mostly dry. Very mild (max 14°C on Fri morning, min 8°C on Thu night). Wind will be generally light.

Monday
28
Tuesday
29
Wednesday
30
Thursday
1
Friday
2
Saturday
3
Sunday
4
Monday
5
Tuesday
6
Wednesday
7
Thursday
8
Friday
9
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
night
Wave Height Map
High Tide
12:29PM1.39m
11:27PM1.94m
1:30PM1.35m
00:10AM1.91m
2:34PM1.31m
00:58AM1.82m
3:41PM1.28m
1:52AM1.69m
4:49PM1.29m
2:55AM1.55m
5:52PM1.32m
6:46PM1.38m
5:24AM1.29m
7:31PM1.44m
6:43AM1.22m
8:08PM1.49m
7:55AM1.19m
8:39PM1.54m
8:58AM1.18m
9:06PM1.58m
9:54AM1.18m
9:31PM1.61m
Low Tide
5:42AM-0.47m
5:28PM0.61m
6:31AM-0.53m
6:16PM0.74m
7:23AM-0.51m
7:09PM0.85m
8:19AM-0.42m
8:13PM0.92m
9:20AM-0.30m
9:32PM0.94m
10:24AM-0.17m
10:59PM0.90m
11:29AM-0.05m
00:19AM0.78m
12:28PM0.05m
1:25AM0.62m
1:18PM0.16m
2:19AM0.45m
2:03PM0.27m
3:05AM0.28m
2:42PM0.39m
3:44AM0.13m
3:18PM0.51m
4:19AM-0.00m
Wave
height (m) 
direction
period (s) 
1.2
SW
16
1.2
SSW
18
1.5
SSW
18
1.4
SSW
17
1.3
SSW
17
1.9
WNW
8
1.5
SSW
16
1.4
SSW
15
1.3
SSW
15
1.1
SSW
14
1
SSW
14
0.9
SSW
14
0.9
W
17
1
W
16
1
W
14
1.6
W
13
2.4
WNW
7
3
WNW
9
3
WNW
11
3
WNW
11
2.5
WNW
11
1.9
WNW
11
1.7
WNW
10
1.7
WNW
10
1.4
WNW
9
1.2
WNW
8
1.9
WNW
7
1.6
W
13
1.7
W
15
2
W
14
1.8
W
14
2.1
W
13
2.1
W
12
1.8
WNW
11
1.7
WNW
11
2
WNW
10
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
light rain
part cloud
part cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
light rain
some clouds
some clouds
cloudy
some clouds
clear
clear
clear
some clouds
some clouds
clear
clear
clear
clear
some clouds
some clouds
clear
clear
clear
clear
clear
 km/h
10
W
20
WNW
5
W
10
SW
15
W
25
NW
10
W
15
WNW
5
WSW
10
SW
15
W
10
WNW
15
WNW
15
WNW
5
SW
30
NW
45
WNW
35
NW
25
NW
40
NW
20
NW
10
NW
25
WNW
10
WNW
10
SSW
15
W
20
NW
20
WNW
25
NW
20
NW
25
NW
30
NW
20
NW
15
NW
20
NW
5
W
 mm 
1
max°C
12
13
9
12
13
11
13
13
10
11
12
10
12
12
12
10
11
10
11
11
10
13
14
10
12
13
10
12
12
11
12
12
10
14
14
10
Moonrise
6:36
7:20
8:14
9:17
10:25
11:35
12:42
1:46
2:47
3:45
4:43
5:41
Moonset
9:42
11:00
12:09
1:06
1:52
2:28
2:57
3:22
3:45
4:06
4:27
Sunrise
6:18
6:16
6:16
6:15
6:13
6:11
6:11
6:09
6:09
6:07
6:07
6:05
Sunset
7:55
7:57
7:58
7:59
8:00
8:00
8:01
8:02
8:04
8:04
8:05
8:06
Today's sea temperature in Half Moon Bay is 13.4 °C (Statistics for 28 Apr 1981-2005 – mean: 12.1 max: 14.4 min: 10.5°C)
Issued (local time): 4 am Monday 28 Apr 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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