Mahai'ula Bay surfForecast / HAW – Big Island / USA

information circle48hr Weather and Surf, issued 1 pm Wednesday 20 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Mahai'ula Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mahai'ula Bay sea temperature is
26.5° C
(Which is 1.3°C warmer than normal for this time of year)
Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 27°C on Wed afternoon, min 23°C on Fri night). Wind will be generally light.

Wed
20
Thursday
21
Friday
22
Sat
23
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
14
0.4
SSW
18
0.4
SSW
18
1.3
NNE
6
0.5
S
16
0.6
SSW
16
0.5
S
16
0.5
S
16
0.1
SW
15
0.5
S
16
0.4
NW
2
0.6
S
15
1.5
NNE
7
1.6
NNE
7
0.6
S
15
1.4
NNE
6
1.3
NNE
6
0.5
S
18
0.5
S
18
1.5
NNE
6
0.6
S
16
0.6
S
16
0.6
S
16
0.6
S
16
Wave Graph
Metric surfscale
Energy kJ
0
0
0
0
0
0
0
0
8
0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
Wind (km/h)
5
WNW
5
NW
5
N
10
NE
5
NE
10
NE
15
NE
10
NE
5
N
5
NNW
10
NNE
15
NNE
10
NE
15
NE
15
NE
10
NE
15
N
15
NNE
15
NNE
10
NE
5
NE
10
ENE
10
NE
5
E
glassy
glassy
glassy
cross-off
glassy
cross-off
cross-off
cross-off
glassy
glassy
cross
cross
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
glassy
cross-off
cross-off
glassy
High Tide
7:22PM0.82m
7:56AM0.29m
8:17PM0.76m
9:38AM0.34m
9:13PM0.68m
Low Tide
11:37AM0.09m
3:05AM0.14m
12:36PM0.17m
4:00AM0.14m
1:55PM0.25m
4:46AM0.13m
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:46
5:46
5:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:54
6:54
6:54
Temp °C
27
27
27
26
25
25
25
26
26
25
26
25
25
24
24
24
25
26
25
25
24
24
23
24
30
30
30
27
28
26
25
26
28
27
26
25
27
24
24
25
25
26
24
25
26
25
24
26
Swell 1
Height (m)
Direction
Period (s)
0.8
NNE
6
0.9
NNE
6
1.1
NNE
6
1.3
NNE
6
1.1
NNE
6
1.1
NNE
6
0.5
S
16
0.5
S
16
0.6
SSW
16
1.3
NNE
6
1.3
NNE
6
0.6
S
15
0.6
SSW
15
0.6
S
15
0.6
S
15
0.5
S
14
0.5
S
14
0.5
S
14
0.5
S
18
0.5
S
17
0.6
S
16
0.6
S
16
0.6
S
16
0.6
S
16
Energy kJ
47
51
82
118
91
88
134
132
201
118
115
159
169
157
155
106
101
97
150
137
190
190
188
183
Swell 2
Height (m)
Direction
Period (s)
0.6
SSW
14
0.5
SSW
14
0.5
SSW
14
0.5
SSW
13
0.5
S
16
0.6
SSW
16
0.4
SSW
13
0.4
SSW
13
0.3
SSE
13
0.5
S
16
0.6
SSW
15
0.3
SSE
5
0.3
SSE
5
0.3
SSE
5
0.3
SSE
5
0.4
S
18
0.4
S
18
0.5
S
18
0.5
S
14
0.4
SSW
14
0.4
SSW
13
0.4
SSW
13
0.4
SSW
13
0.4
SSW
13
Energy kJ
156
107
104
102
135
203
57
56
33
124
174
4
4
5
5
102
98
154
93
61
58
58
57
57
Swell 3
Height (m)
Direction
Period (s)
0.3
SSW
18
0.4
SSW
18
0.4
SSW
18
0.4
SSW
17
0.4
SSW
13
0.4
SSW
13
0.3
SSE
13
0.2
SSE
13
0.1
SW
15
0.3
SSE
13
0.3
SSW
12
0.3
SSW
12
0.3
SSW
12
0.3
SSW
12
0.2
SSE
12
0.2
SSE
5
0.2
SSE
5
0.2
SSE
4
0.3
SSE
12
0.2
SSE
4
0.2
SSE
12
0.4
NE
9
0.2
SSE
12
0.2
SSE
4
Energy kJ
62
103
103
97
67
57
35
17
8
33
29
29
28
28
14
2
2
2
28
2
14
30
14
2
Wind waves
Height (m)
Direction
Period (s)
0.2
SSW
9
0.2
SSW
14
0.3
SSW
14
1.2
NNE
6
1.2
NNE
6
1.3
NNE
6
0.4
NW
2
1.3
NNE
6
1.5
NNE
7
1.6
NNE
7
1.4
NNE
6
1.4
NNE
6
1.3
NNE
6
1.1
NNE
6
1.3
NNE
6
1.5
NNE
6
1.4
NNE
6
1.1
NNE
6
1.2
NNE
7
1.2
NNE
6
Energy kJ
8
19
38
103
103
111
2
149
205
222
160
145
115
88
115
170
150
91
142
113
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
2
1
1
1
1
1
1
Distance (km)
100
113
1
1
1
1
1
1
11
1
3765
11
1
1
1
1
11
18
13
1
1
1
1
1
Best forecast wave conditions in Big Island
Rating
(10 max)
2
2
2
2
2
2
1
1
2
2
2
2
2
2
2
2
2
2
4
2
2
Best forecast wave conditions in United States
Rating
(10 max)
1
1
4
3
3
4
3
2
3
1
4
3
3
3
2
2
2
2
2
2
2
4
2
3
Header Global
Rating
(10 max)
5
5
5
5
5
5
4
5
4
4
5
7
8
7
6
5
5
6
7
7
8
8
7
6
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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