Waimanu Bay Surf Forecast

/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /

USA (1297 breaks) / Lat Long: (20.15° N 155.64° W)

Surf Forecasts:

Waimanu Bay surfForecast / HAW – Big Island / USA

12 Day Weather and Surf, issued 7 am Wednesday 17 Sep 2025 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 26.9° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Waimanu Bay this week:

The most powerful waves expected at Waimanu Bay in the next 12 days are 1.8m 9s and forecast to arrive on Sunday (Sep 21) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Tuesday (Sep 23) at 11PM.

Wave Type	Time (HST) & Date	Wave Height & Period
Next good surf (1 star+)	-	-
Best Surf	-	-
Most Powerful	5PM (Sun 21st Sep)	6ft (1.8m) 9s

Table - best surf conditions forecast for Waimanu Bay over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 4mm), mostly falling on Fri night. Warm (max 27°C on Wed morning, min 24°C on Wed night). Wind will be generally light.									Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Sat morning. Warm (max 27°C on Sat morning, min 24°C on Sun night). Mainly fresh winds.
	Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	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	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	E	E	E	E	E	E	N	N	N	NE	ENE	NE	ENE	ENE	NE	ENE	ENE	ENE	ENE	ENE	ENE
Period(s) (?)	7	6	7	7	5	7	11	11	10	8	7	8	8	9	9	8	8	8	8	7	7
Wave Graph (?)
kJ (?)	155	207	168	198	115	97	87	112	102	244	208	183	422	471	240	389	344	248	250	254	172
Wind (km/h)	ENE	E	E	ENE	E	E	ENE	ENE	E	ENE	E	E	E	E	E	E	E	E	ENE	ENE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- 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	cross- on	cross- on	cross- on	cross- on	cross- on	cross
High Tide / height (m)	12:48PM 0.87		12:43AM 0.52	1:22PM 0.87		1:23AM 0.59	1:51PM 0.86		1:59AM 0.66		2:17PM 0.83	2:33AM 0.72		2:40PM 0.78	3:06AM 0.77		3:02PM 0.73	3:40AM 0.80		3:22PM 0.67	4:14AM 0.81
Low Tide / height (m)		7:37PM 0.28		6:24AM 0.16	7:56PM 0.24		7:10AM 0.16		8:15PM 0.21	7:51AM 0.17		8:34PM 0.19	8:30AM 0.19		8:54PM 0.16	9:08AM 0.23		9:13PM 0.15	9:46AM 0.27		9:33PM 0.14

	Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
Sunrise	6:09	-	-	6:09	-	-	6:09	-	-	6:09	-	-	6:11	-	-	6:11	-	-	6:11	-	-
Sunset	-	6:22	-	-	6:22	-	-	6:21	-	-	6:20	-	-	6:19	-	-	6:17	-	-	6:17	-

Rain (mm)	-	-	-	-	-	-	-	-	4	1	1	2	-	-	-	-	-	1	-	-	-
Temp. °C	27	27	25	27	27	26	27	27	26	27	27	25	27	27	25	27	27	25	26	27	25
Feels °C (?)	26	26	25	26	26	26	26	27	28	27	27	25	26	26	24	24	25	25	24	25	24

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for HAW - Big Island

Wind Update Continuing clean conditions at Waimanu Bay (light winds from the E at Kapulena wx 12 km from Waimanu Bay). 1.3m 7s swell from the E with a 0.5m 8s swell from the N and a 0.3m 8s swell, also from the N. 3 swells combining to make bigger set waves.
41 minutes ago Waimanu Bay

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Actual: 41 min ago

6 km/h

Clean

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Waimanu Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

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 12 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.