Chatham, Cape Cod Sea Conditions and Tide Table

Chatham, Cape Cod 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 06:43 AM and sunset is at 06:51 PM.

Days 1–3 Weather Summary

Light rain (total 4mm), mostly falling on Thu night. Low air temperatures (max 9°C on Sat afternoon, min 1°C on Sat night). Winds increasing (light winds from the SE on Thu morning, strong winds from the NW by Fri afternoon).

Days 4–6 Weather Summary

A dusting of snow giving way to moderate rain (total 19mm) heaviest on Mon morning. Icy conditions (max 9°C on Mon afternoon, min -2°C on Sun morning). Winds increasing (calm on Sun afternoon, near gales from the S by Mon morning).

Days 7–9 Weather Summary

Some drizzle, heaviest during Thu afternoon. Freeze-thaw conditions (max 8°C on Thu night, min -1°C on Fri morning). Winds increasing (light winds from the SW on Wed night, strong winds from the WNW by Fri morning).

Days 10–12 Weather Summary

A light covering of new snow, mostly falling on Sat night. Freeze-thaw conditions (max 3°C on Mon morning, min -2°C on Sat afternoon). Winds decreasing (strong winds from the NE on Sun morning, light winds from the NE by Sun night).

Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
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
5:15PM1.19m
5:26AM1.46m
6:02PM1.13m
6:18AM1.43m
6:51PM1.10m
7:13AM1.44m
7:46PM1.11m
8:11AM1.48m
8:51PM1.16m
9:08AM1.56m
9:56PM1.26m
10:05AM1.65m
10:48PM1.41m
10:58AM1.73m
11:32PM1.56m
11:49AM1.79m
00:14AM1.71m
12:38PM1.81m
00:57AM1.84m
1:26PM1.79m
1:42AM1.93m
2:15PM1.74m
2:30AM1.97m
Low Tide
11:25AM-0.02m
11:04PM0.12m
12:13PM-0.00m
11:50PM0.15m
1:05PM0.02m
00:46AM0.16m
2:00PM0.02m
1:48AM0.14m
3:00PM0.01m
2:51AM0.09m
4:03PM-0.02m
3:53AM0.02m
5:03PM-0.06m
5:56PM-0.10m
6:00AM-0.13m
6:45PM-0.13m
7:03AM-0.20m
7:31PM-0.14m
8:02AM-0.25m
8:16PM-0.14m
8:58AM-0.27m
9:01PM-0.12m
Wave
height (m) 
direction
period (s) 
0.8
E
10
0.9
E
11
0.8
E
10
0.9
E
10
1.1
NE
7
0.8
E
10
0.6
E
9
0.8
SSW
4
0.8
WNW
3
0.8
NNW
4
0.4
ENE
7
0.5
S
3
1.4
SE
7
0.9
SE
7
0.6
SE
9
0.6
SE
10
0.7
SE
10
0.4
SE
9
0.7
W
4
0.6
NE
5
0.4
SSW
4
0.5
SE
4
1
S
4
0.7
SSW
5
0.9
NW
4
0.6
NNW
3
0.4
NE
6
0.3
ENE
6
0.3
ESE
9
0.8
E
4
1.2
E
6
1
E
8
0.8
E
8
0.6
E
8
0.5
E
8
0.6
E
8
cloud
cloud
light rain
light rain
cloud
clear
part cloud
cloud
part cloud
clear
clear
snow showers
heavy rain
mod rain
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
light rain
clear
clear
clear
part cloud
cloud
cloud
mod snow
light snow
cloud
part cloud
part cloud
part cloud
part cloud
cloudy
cloudy
light rain
light rain
cloudy
clear
some clouds
cloudy
some clouds
clear
clear
snow shwrs
heavy rain
mod rain
some clouds
some clouds
some clouds
clear
clear
some clouds
some clouds
cloudy
light rain
clear
clear
clear
some clouds
cloudy
cloudy
mod snow
light snow
cloudy
some clouds
some clouds
some clouds
some clouds
 km/h
15
SE
20
SE
15
SSE
35
NW
40
NW
30
W
30
SW
35
SW
35
WNW
30
NW
0
S
25
SSW
55
S
25
SW
15
SW
15
WSW
30
WSW
20
WSW
30
W
25
WNW
15
W
25
S
40
SSW
30
WNW
35
NW
25
NW
15
NNW
10
N
15
ENE
30
E
35
NE
25
NE
5
NE
10
E
15
SE
15
E
 mm 
3
1.0
13
6
1.0
max°C
5
6
8
8
6
6
8
9
8
-1
3
4
8
9
8
6
7
6
4
6
6
6
7
8
0
3
4
0
0
0
0
2
2
3
3
3
Moonrise
12:34
1:37
2:35
3:25
4:08
4:44
5:13
5:39
6:03
6:27
6:52
7:20
Moonset
9:23
10:06
10:59
12:01
1:11
2:26
3:42
5:00
6:18
7:38
8:59
10:22
Sunrise
6:43
6:41
6:39
6:37
6:37
6:35
6:33
6:31
6:30
6:28
6:26
6:24
Sunset
6:51
6:52
6:52
6:53
6:54
6:55
6:58
6:59
7:00
7:00
7:01
7:02
Today's sea temperature in Chatham, Cape Cod is 3.9 °C (Statistics for 20 Mar 1981-2005 – mean: 4.3 max: 5.9 min: 2.8°C)
Issued (local time): 1 am Thursday 20 Mar 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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