Waimanu Bay Surf Break

Lat Long: 20.15° N 155.64° W

Waimanu Bay Surf Forecast and Surf Report

Issued: 7 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Waimanu Bay sea temperature is
27.3°C
0.6° 

Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Waimanu Bay surf forecast from 4 Sep 2026:

  • Best quality surf: Monday 7 Sep, 11PM (local time) - 6ft (1.8m), 12s period, ENE swell with glassy winds.
  • Most powerful swell: Saturday 5 Sep, 2PM (local time) - 8ft (2.4m), 14s period, ENE swell with 2,171 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 11PM (local time) - 6ft (1.8m), 12s period with ENE swell.

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 Monday (Sep 07) at 11PM. The primary swell is predicted to be 1.8m and 12s period with a secondary swell of 0.8m and 5s. 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 2.4m 14s and forecast to arrive on Saturday (Sep 05) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 14s period and expected on Monday (Sep 07) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Mon 7th Sep)6ft (1.8m) 12s
Best Surf11PM (Mon 7th Sep)6ft (1.8m) 12s
Most Powerful 2PM (Sat 5th Sep)8ft (2.4m) 14s

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


Short Range Forecast

Light rain (total 6mm), mostly falling on Sun afternoon. Warm (max 27°C on Sat morning, min 24°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Mon afternoon. Warm (max 28°C on Tue morning, min 24°C on Wed night). Wind will be generally light.

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
3
1
1
1
1
1
2
1
3
4
2
2
1
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
E
14
2
E
14
1.9
ENE
14
2
E
13
2.5
ENE
13
2.4
ENE
13
2.3
ENE
12
2.4
ENE
12
2.1
E
12
2.4
ENE
12
2.3
ENE
12
1.9
ENE
11
1.7
NE
10
0.9
E
14
0.9
E
13
0.9
E
13
0.8
E
13
0.8
E
12
1.3
ENE
7
1.4
ENE
7
1.6
ENE
8
Wave Graph
Metric surfscale
Energy kJ
1807
1645
1408
1443
2123
1836
1461
1538
1269
1622
1444
853
640
321
289
276
209
184
167
203
319
Wind (km/h)
20
E
20
E
15
ESE
15
ENE
15
E
20
E
20
E
20
E
20
E
20
E
15
E
5
W
10
N
10
E
20
E
20
ENE
25
ENE
20
E
25
E
20
ENE
20
E
Wind State
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross
cross-off
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
High Tide
10:04AM0.78m
11:22AM0.83m
10:13PM0.40m
12:16PM0.89m
11:45PM0.45m
12:59PM0.93m
00:43AM0.52m
1:36PM0.94m
1:30AM0.60m
2:09PM0.92m
2:13AM0.67m
2:38PM0.89m
2:54AM0.73m
Low Tide
2:52AM0.18m
7:10PM0.37m
4:24AM0.16m
7:25PM0.32m
5:35AM0.13m
7:47PM0.28m
6:32AM0.10m
8:11PM0.23m
7:21AM0.10m
8:35PM0.20m
8:06AM0.12m
8:58PM0.17m
part cloud
part cloud
clear
clear
rain showers
rain showers
part cloud
thunderstorm
rain showers
part cloud
rain showers
clear
clear
thunderstorm
thunderstorm
clear
clear
part cloud
part cloud
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:07
6:07
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:35
6:34
6:32
6:31
6:30
6:30
6:30
 mm
1
1
3
1
2
2
1
1
Temp °C
26
26
25
27
27
26
27
27
26
27
27
27
28
28
27
28
28
26
26
27
25
Feels °C
25
26
25
28
29
28
28
29
28
28
30
31
32
33
31
29
29
27
25
27
26
  • 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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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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