Waimanu Bay Surf Break

Lat Long: 20.15° N 155.64° W

Waimanu Bay Surf Forecast and Surf Report

Issued: 1 pm 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Waimanu Bay sea temperature is
27.5°C
0.8° 

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 14 Sep 2026:

  • Most powerful swell: Thursday 17 Sep, 2PM (local time) - 8ft (2.4m), 9s period, ENE swell with 858 kJ wave energy.

Best Forecast Surf Conditions for Waimanu Bay this week:

The most powerful waves expected at Waimanu Bay in the next 16 days are 2.4m 9s and forecast to arrive on Thursday (Sep 17) 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 0.2m 13s period and expected on Sunday (Sep 20) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Thu 17th Sep)8ft (2.4m) 9s

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


Short Range Forecast

Mostly dry. Warm (max 28°C on Tue morning, min 25°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 8mm), mostly falling on Wed afternoon. Warm (max 28°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light.

Sun
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
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)
0.9
NNE
9
0.9
NE
8
0.9
NE
8
0.7
NE
8
0.4
E
12
0.5
E
12
0.6
E
11
1
E
10
1.3
E
10
1.4
ENE
10
1.6
ENE
10
2.2
ENE
9
2.4
ENE
9
2
E
8
2
E
8
1.9
E
8
1.7
E
8
1.8
E
8
1.9
ENE
8
1.7
E
8
Wave Graph
Metric surfscale
Energy kJ
121
120
100
69
48
66
85
210
339
356
461
758
841
552
520
470
396
450
522
403
Wind (km/h)
10
ENE
10
E
10
NE
15
ENE
10
E
20
E
20
ENE
15
E
25
ENE
25
ENE
20
ENE
20
E
25
E
25
E
25
E
25
E
20
E
25
E
20
E
25
E
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
High Tide
3:51PM0.69m
4:53AM0.79m
4:10PM0.62m
5:36AM0.77m
4:24PM0.56m
6:28AM0.74m
4:28PM0.51m
7:40AM0.70m
9:21AM0.69m
10:50AM0.71m
9:14PM0.38m
Low Tide
10:09PM0.13m
11:00AM0.35m
10:33PM0.15m
11:51AM0.41m
10:59PM0.17m
1:04PM0.46m
11:29PM0.20m
00:12AM0.24m
1:37AM0.27m
7:48PM0.37m
3:34AM0.27m
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
rain showers
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
part cloud
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:27
6:25
6:24
6:23
6:22
6:22
6:21
 mm
1
3
1
1
2
Temp °C
27
25
27
27
26
28
28
27
28
28
27
28
28
26
28
28
26
27
27
26
Feels °C
29
27
30
30
29
30
29
28
29
29
29
30
30
27
28
29
26
27
28
26
  • 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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