Harbor Bay, Great Swan Island Sea Conditions and Tide Table

Harbor Bay, Great Swan Island 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 05:58 AM and sunset is at 05:04 PM.

Days 1–3 Weather Summary

Moderate rain (total 12mm), heaviest on Thu afternoon. Warm air temperatures (max 27°C on Thu morning, min 26°C on Thu afternoon). Wind will be generally light.

Days 4–6 Weather Summary

Moderate rain (total 12mm), heaviest on Sun afternoon. Warm air temperatures (max 27°C on Sun morning, min 26°C on Sun night). Mainly fresh winds.

Days 7–9 Weather Summary

Heavy rain (total 20mm), heaviest during Wed night. Warm (max 27°C on Wed morning, min 26°C on Wed morning). Mainly strong winds.

Days 10–12 Weather Summary

Light rain (total 7mm), mostly falling on Sun night. Warm (max 27°C on Sat night, min 26°C on Sat morning). Winds decreasing (fresh winds from the ENE on Sat morning, light winds from the ESE by Mon morning).

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
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
8:14AM0.18m
7:03PM0.30m
8:47AM0.18m
7:42PM0.31m
9:21AM0.17m
8:20PM0.31m
9:57AM0.17m
8:59PM0.31m
10:34AM0.17m
9:37PM0.30m
11:13AM0.17m
10:18PM0.29m
11:51AM0.18m
11:04PM0.27m
12:29PM0.19m
11:57PM0.24m
1:07PM0.20m
1:04AM0.20m
1:47PM0.23m
2:28AM0.17m
2:32PM0.25m
4:06AM0.16m
3:23PM0.28m
5:35AM0.15m
Low Tide
1:14PM0.10m
2:52AM-0.02m
1:49PM0.09m
3:29AM-0.02m
2:23PM0.09m
4:06AM-0.02m
2:59PM0.09m
4:42AM-0.02m
3:37PM0.09m
5:19AM-0.02m
4:20PM0.08m
5:55AM-0.01m
5:12PM0.08m
6:33AM0.01m
6:14PM0.08m
7:11AM0.02m
7:30PM0.06m
7:52AM0.04m
8:52PM0.04m
8:37AM0.06m
10:11PM0.01m
9:27AM0.08m
11:22PM-0.03m
Wave
height (m) 
direction
period (s) 
1.1
NE
6
1
ENE
6
0.9
ENE
5
1
E
6
0.9
E
7
1.1
E
6
1.1
E
7
1.2
E
6
1.2
E
6
1.3
ENE
6
1.1
ENE
6
1.3
ENE
5
1.4
NE
6
1.4
NE
6
1.8
ENE
7
1.6
ENE
7
1.7
ENE
7
1.9
ENE
7
1.8
ENE
7
1.9
ENE
7
2.5
NE
8
2.5
NE
8
2.5
ENE
8
3
ENE
8
2.5
ENE
8
2.5
ENE
8
2.4
ENE
8
2.3
ENE
8
2
ENE
8
2
ENE
7
1.9
ENE
7
1.9
ENE
7
1.8
NE
7
1.5
ENE
7
1.5
ENE
7
1.5
ENE
7
thunderstorm
rain showers
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
clear
clear
clear
rain showers
thunderstorm
clear
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
clear
clear
rain showers
rain showers
clear
clear
clear
thunderstorm
thunderstorm
thunderstorm
clear
clear
rain showers
risk tstorm
rain shwrs
risk tstorm
clear
risk tstorm
risk tstorm
risk tstorm
clear
clear
clear
rain shwrs
risk tstorm
clear
risk tstorm
rain shwrs
risk tstorm
risk tstorm
risk tstorm
risk tstorm
risk tstorm
mod rain
risk tstorm
risk tstorm
clear
clear
rain shwrs
rain shwrs
clear
clear
clear
risk tstorm
risk tstorm
risk tstorm
clear
clear
rain shwrs
 km/h
20
ESE
15
ESE
25
E
25
E
20
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
20
NE
30
NE
30
ENE
30
ENE
30
NE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
35
ENE
40
ENE
40
ENE
45
ENE
35
ENE
40
ENE
35
ENE
35
ENE
25
ENE
35
ENE
30
E
25
E
25
E
15
ESE
15
ESE
20
E
 mm 
1
2
1
3
4
1
1
2
1
1
1
2
4
1
3
9
2
3
1
1
2
1
3
1
max°C
27
27
27
27
27
27
27
27
27
27
27
26
27
27
27
27
27
27
27
27
26
26
27
26
27
27
27
26
26
27
26
27
26
26
27
26
Moonrise
4:48
5:42
6:34
7:24
8:10
8:52
9:31
10:08
10:45
11:21
12:00
12:42
Moonset
3:57
4:47
5:41
6:36
7:31
8:25
9:18
10:11
11:03
11:58
12:55
Sunrise
5:58
5:58
6:00
6:00
6:01
6:01
6:01
6:01
6:03
6:03
6:03
6:03
Sunset
5:04
5:05
5:05
5:06
5:06
5:07
5:07
5:07
5:07
5:08
5:09
5:09
Today's sea temperature in Harbor Bay, Great Swan Island is
28.6° C
(Statistics for 18 Dec 1981-2005 – mean: 27.2 max: 27.9 min: 26.7°C)
Issued (local time): 11 am Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest