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

information circle48hr Weather and Surf, issued 7 am Friday 22 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 1.2°C warmer than normal for this time of year)

How big are the waves at Mahai'ula Bay today?

The current surf forecast for Mahai'ula Bay at 12PM is: 0.3m 2s primary swell from a West-southwest direction (forecast issued at 07:00am May 22). An open ocean swell of 1.3m 6s is not directed at the surf break, a second open ocean swell of 0.5m 14s is not directed at the surf break. The wind direction is predicted to be cross-onshore.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 26°C on Fri morning, min 23°C on Sat night). Wind will be generally light.

Friday
22
Saturday
23
Sunday
24
Mon
25
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
11 AM
2 PM
5 PM
8 PM
11 PM
2 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
S
15
1.3
NNE
6
0.3
WSW
2
0.5
S
18
0.5
S
18
0.5
S
17
1.4
NNE
7
0.6
S
16
0.6
S
16
0.6
S
16
0.5
S
16
0.1
NW
11
0.7
S
15
0.2
NNW
16
0.7
S
15
0.3
WNW
2
1
NNE
9
0.6
S
14
0.2
NNW
13
0.6
S
14
0.3
NW
12
0.3
NW
12
0.3
NW
12
1.2
NNE
8
Wave Graph
Metric surfscale
Energy kJ
0
0
1
0
0
0
0
0
0
0
0
4
0
24
0
1
0
0
17
0
24
23
23
0
Wind (km/h)
15
NE
10
NE
10
N
10
N
15
NNE
15
NE
10
ENE
5
ENE
15
NE
10
ENE
5
N
5
NNE
5
E
5
E
10
NE
10
NE
10
ENE
0
ENE
5
NW
5
NW
5
NNE
10
NNE
5
E
10
ENE
cross-off
cross-off
cross-on
cross
cross
cross-off
cross-off
glassy
cross-off
cross-off
glassy
cross
glassy
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-on
cross
cross
glassy
cross-off
High Tide
9:38AM0.34m
9:13PM0.68m
11:07AM0.41m
10:10PM0.62m
12:10PM0.51m
11:04PM0.55m
Low Tide
4:00AM0.14m
1:55PM0.25m
4:46AM0.13m
3:40PM0.31m
5:24AM0.11m
5:26PM0.33m
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:46
5:46
5:45
5:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:54
6:55
6:55
Temp °C
24
25
26
26
26
25
24
24
24
25
26
25
24
24
24
24
23
24
26
26
26
25
24
24
24
25
27
27
25
25
25
26
23
25
28
27
26
26
24
25
23
26
27
27
27
26
26
25
Swell 1
Height (m)
Direction
Period (s)
0.6
S
15
0.5
S
14
1.3
NNE
6
0.5
S
14
0.5
S
18
1.3
NNE
6
0.6
S
16
0.6
S
16
0.6
S
16
0.6
S
16
0.6
NNE
8
0.7
S
15
0.7
NE
8
1.4
NNE
8
1.2
NNE
8
1
NNE
9
1
NNE
9
0.9
NNE
9
1
NNE
9
1
NNE
8
1.1
NNE
8
1
NNE
8
1
NNE
8
1.2
NNE
8
Energy kJ
155
106
118
97
150
149
190
190
188
183
48
218
74
248
193
157
154
129
154
143
169
143
143
179
Swell 2
Height (m)
Direction
Period (s)
0.3
SSE
4
0.4
S
18
0.5
S
14
0.5
S
18
0.5
S
14
0.5
S
17
0.4
SSW
13
0.4
SSW
13
0.4
SSW
13
0.4
SSW
13
0.5
S
15
0.2
SSE
12
0.7
S
15
0.7
S
15
0.7
S
15
0.7
S
14
0.6
S
14
0.6
S
14
0.6
S
14
0.6
S
14
0.7
S
14
0.7
S
14
0.7
S
14
0.6
S
13
Energy kJ
4
102
101
154
93
137
58
58
57
57
109
13
212
212
209
198
134
132
132
132
186
191
194
117
Swell 3
Height (m)
Direction
Period (s)
0.2
SSE
12
0.3
SSE
4
0.4
S
18
0.3
SSE
12
0.2
SSE
12
0.4
SSW
14
0.2
SSW
11
0.2
SSE
12
0.2
SSE
12
0.2
SSE
5
0.5
S
16
0.1
NW
11
0.2
SSE
11
0.2
NNW
16
0.2
S
5
0.3
S
3
0.3
S
16
0.3
S
16
0.2
NNW
13
0.3
S
16
0.3
NW
12
0.3
NW
12
0.3
NW
12
0.3
S
15
Energy kJ
14
4
98
28
14
61
11
14
14
2
131
4
12
24
2
2
47
46
17
46
24
23
23
39
Wind waves
Height (m)
Direction
Period (s)
1.2
NNE
6
1.3
NNE
6
0.3
WSW
2
1.3
NNE
6
1.3
NNE
6
1.4
NNE
7
1.3
NNE
6
1.4
NNE
6
1.4
NNE
6
1.3
NNE
6
1.5
NNE
7
1.3
NNE
7
0.4
SSE
11
0.4
SSE
11
0.3
WNW
2
0.3
W
2
Energy kJ
96
115
1
118
145
165
122
141
160
126
192
154
47
40
1
1
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
Distance (km)
18
1
113
113
11
1
1
1
11
1
1
11
1
1
1
1
1
1
1
103
11
1
1
1
Best forecast wave conditions in Big Island
Rating
(10 max)
2
2
2
2
2
2
2
2
1
1
2
2
2
2
2
3
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
3
2
3
3
2
2
3
3
2
2
3
3
2
2
2
3
2
4
1
2
1
2
3
3
Header Global
Rating
(10 max)
6
7
6
5
5
6
7
8
7
6
5
5
5
5
5
5
5
5
5
5
4
5
5
5
  • 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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