Waimanu Bay surfForecast / HAW – Big Island / USA

information circle16 Day Weather and Surf, issued 7 pm Thursday 07 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waimanu Bay sea temperature is
25.4° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Waimanu Bay this week:

The surf forecast for Waimanu Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (May 08) at 5AM. The primary swell is predicted to be 1.4m and 13s period with a secondary swell of 0.8m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Waimanu Bay in the next 16 days are 1.4m 13s and forecast to arrive on Friday (May 08) at 5AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Fri 8th May)4.5ft (1.4m) 13s
Best Surf 5AM (Fri 8th May)4.5ft (1.4m) 13s
Most Powerful 5AM (Fri 8th May)4.5ft (1.4m) 13s

Table - best surf conditions forecast for Waimanu Bay over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Fri night. Warm (max 25°C on Fri morning, min 23°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Sun night. Warm (max 25°C on Mon morning, min 22°C on Mon night). Mainly fresh winds.

Friday
8
Saturday
9
Sunday
10
Monday
11
Tuesday
12
Wednesday
13
Thu
14
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
3
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
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<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
1.5
NNW
14
1.3
NNW
13
1.2
NNW
12
0.9
NNW
12
0.8
NNW
11
0.8
NNW
11
0.9
E
8
1.2
E
8
0.9
NNW
11
1.3
E
8
1.2
E
8
1.3
E
8
1.3
E
8
1.2
E
8
0.8
NNW
11
1
E
8
1.8
NE
7
1.5
ENE
7
1.5
ENE
7
1.4
ENE
7
0.7
NW
15
Wave Graph
Metric surfscale
Energy kJ
791
512
403
239
163
133
105
185
177
191
177
217
212
160
158
110
318
198
204
197
229
Wind (km/h)
5
ENE
10
NE
10
ENE
15
E
20
E
20
E
20
E
20
E
20
ENE
25
E
30
ENE
30
ENE
25
E
25
ENE
25
ENE
25
ENE
30
ENE
30
E
30
E
30
ENE
30
E
glassy
on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
6:06AM0.38m
8:21PM0.77m
8:44AM0.39m
9:16PM0.75m
10:44AM0.46m
10:08PM0.73m
11:48AM0.57m
10:55PM0.71m
12:35PM0.69m
11:40PM0.68m
1:17PM0.81m
00:22AM0.64m
1:58PM0.92m
Low Tide
3:54AM0.37m
11:56AM0.25m
4:35AM0.33m
1:14PM0.32m
5:01AM0.28m
3:09PM0.38m
5:25AM0.23m
4:52PM0.40m
5:51AM0.17m
6:12PM0.39m
6:19AM0.10m
7:19PM0.37m
6:50AM0.05m
clear
part cloud
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
part cloud
part cloud
rain showers
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:48
5:48
5:48
5:48
5:47
5:47
5:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:47
6:47
6:49
6:49
6:50
6:50
6:50
6:51
1
1
3
3
Temp °C
24
25
25
24
25
25
24
25
25
24
25
25
23
25
25
23
24
24
23
24
23
25
27
27
25
25
25
23
24
23
24
22
23
21
23
23
21
22
22
21
22
21
Swell 1
Height (m)
Direction
Period (s)
1.5
NNW
14
1.3
NNW
13
1.2
NNW
12
0.9
NNW
12
0.8
NNW
11
0.8
NNW
11
0.6
NNW
11
0.7
NNW
11
0.9
NNW
11
0.9
NNW
10
0.7
N
9
0.7
NNW
11
0.7
NNW
10
0.6
NNW
11
0.7
NNW
11
1
N
6
0.5
NNW
9
1.3
N
8
1.2
N
8
1.1
N
8
1.1
N
8
Energy kJ
791
512
403
239
163
133
78
111
170
152
83
105
97
88
123
81
50
198
182
157
157
Swell 2
Height (m)
Direction
Period (s)
0.8
E
8
0.8
E
8
0.7
E
8
0.2
NNE
9
0.2
NNE
8
0.1
NE
8
0.5
N
7
0.4
NNW
6
0.1
NW
15
0.2
NNW
13
0.6
NNW
12
0.9
NNW
11
0.1
N
15
0.3
N
13
0.8
NNW
11
0.5
NNW
10
0.2
N
13
0.2
N
12
0.2
NNW
18
0.5
NW
17
0.7
NW
15
Energy kJ
86
86
66
7
7
3
21
14
8
18
94
197
4
28
158
56
13
12
31
137
229
Swell 3
Height (m)
Direction
Period (s)
0.3
NE
9
0.2
NNE
9
0.3
NE
8
0.1
SE
16
0.1
N
10
0.1
N
9
0.1
NE
8
0.1
NE
8
0.1
N
9
0.4
NW
13
0.1
SE
12
0.1
SE
12
0.3
NW
11
0.7
NNW
10
0.1
SE
11
0.1
SE
11
0.1
N
12
0.1
NW
12
Energy kJ
13
8
11
10
2
2
3
3
1
46
6
6
18
88
5
5
3
6
Wind waves
Height (m)
Direction
Period (s)
0.9
ESE
8
1
E
4
1
E
4
0.9
E
8
1.2
E
8
1.2
E
8
1.3
E
8
1.2
E
8
1.3
E
8
1.3
E
8
1.2
E
8
1.1
E
8
1
E
8
1.8
NE
7
1.5
ENE
7
1.5
ENE
7
1.4
ENE
7
1.3
E
7
Energy kJ
109
35
35
105
185
177
191
177
217
212
160
138
110
318
192
204
197
159
Nearest Offshore or Glassy
Rating
(10 max)
3
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
Distance (km)
0
77
24
58
98
107
66
77
98
58
77
66
66
98
81
66
98
58
58
77
58
Best forecast wave conditions in Big Island
Rating
(10 max)
3
2
1
2
1
1
1
1
1
1
1
1
1
1
2
1
Best forecast wave conditions in United States
Rating
(10 max)
4
3
3
4
3
2
4
2
3
3
3
3
3
3
2
2
2
2
3
3
2
Header Global
Rating
(10 max)
6
6
5
5
5
4
5
5
9
5
5
5
6
8
9
7
5
5
5
4
6
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Waimanu Bay Surf forecast

The above surf forecast table for Waimanu Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanu Bay can be found by selecting the local surf guide option on the grey menu. Our Waimanu Bay surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Waimanu Bay) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Waimanu Bay may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Waimanu Bay is 74 km (46 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.

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