Waiaha Rivermouth / Honls Surf Forecast

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

USA (1297 breaks)

Surf Forecasts:

Waiaha Rivermouth / Honls surfForecast / HAW – Big Island / USA

12 Day Weather and Surf, issued 7 pm Wednesday 17 Sep 2025 HST

Forecast update in hr min s Forecast update imminent

Waiaha Rivermouth / Honls surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Waiaha Rivermouth / Honls sea temperature is 27.1° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Waiaha Rivermouth / Honls this week:

The surf forecast for Waiaha Rivermouth / Honls over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 5AM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.4m and 15s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Waiaha Rivermouth / Honls in the next 12 days are 0.9m 16s and forecast to arrive on Saturday (Sep 20) at 8AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Sep 19) at 5AM.

Wave Type	Time (HST) & Date	Wave Height & Period
Next good surf (1 star+)	5AM (Thu 18th Sep)	1.5ft (0.4m) 15s
Best Surf	8AM (Fri 19th Sep)	1.5ft (0.4m) 19s
Most Powerful	8AM (Sat 20th Sep)	3ft (0.9m) 16s

Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Mostly dry. Warm (max 27°C on Thu morning, min 25°C on Wed night). Wind will be generally light.										Days 3-6 Weather Summary Moderate rain (total 19mm), heaviest on Sun afternoon. Warm (max 27°C on Sun morning, min 25°C on Sat night). Wind will be generally light.
		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wed 24
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	0	0	0	1	1	1	2	2	2	2	0	1	1	0	0	0	0	0	0	0	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW
Period(s) (?)	15	14	14	13	19	18	16	16	15	14	14	13	13	12	12	12	15	14	13	11	12
Wave Graph (?)
kJ (?)	55	52	51	70	118	243	376	446	417	371	261	253	198	86	85	83	84	70	102	41	50
Wind (km/h)	NW	W	W	SW	WSW	WSW	SW	W	WSW	N	SW	NW	SSW	W	SW	NW	WSW	SW	NW	W	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross	cross- on	cross- on	glass	on	on	glass	cross- on	glass	cross- off	on	cross	cross- on	cross- on	on	cross	cross- on	on	cross	cross- on	glass
High Tide / height (m)	1:35AM 0.34	1:49PM 0.70		2:15AM 0.40		2:25PM 0.67	2:51AM 0.45		2:56PM 0.62	3:25AM 0.50		3:25PM 0.57	3:59AM 0.54		3:52PM 0.51	4:33AM 0.58		4:19PM 0.45		5:09AM 0.59	4:46PM 0.40
Low Tide / height (m)	8:17PM 0.09	6:54AM 0.09		8:43PM 0.08	7:46AM 0.09		9:06PM 0.07	8:34AM 0.10		9:27PM 0.07	9:19AM 0.11		9:47PM 0.07	10:03AM 0.13		10:06PM 0.07	10:48AM 0.16		10:26PM 0.07	11:38AM 0.19

		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wed 24
Sunrise	-	6:11	-	-	6:11	-	-	6:11	-	-	6:11	-	-	6:11	-	-	6:11	-	-	6:13	-
Sunset	-	-	6:22	-	-	6:22	-	-	6:22	-	-	6:21	-	-	6:20	-	-	6:19	-	-	6:17

Rain (mm)	-	-	-	-	-	-	-	-	-	2	-	3	7	1	3	2	-	1	2	-	-
Temp. °C	26	27	26	26	27	27	26	27	27	26	27	26	25	27	26	25	27	26	26	26	26
Feels °C (?)	29	29	28	30	29	29	30	29	30	29	29	28	27	29	28	28	29	28	29	28	28

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 Waiaha Rivermouth / Honls (calm at Kailua Kona 4 km from Waiaha Rivermouth / Honls). 0.7m 8s swell from the SSE with a 0.5m 3s local chop from the WNW and a 0.4m 12s groundswell from the SSW as well as a 0.3m 15s groundswell, also from the SSW. 4 swells combining to make bigger set waves.
1 hour 10 minutes ago Waiaha Rivermouth / Honls

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1 h 10 min ago

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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 Waiaha Rivermouth / Honls 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 Waiaha Rivermouth / Honls Surf forecast

The above surf forecast table for Waiaha Rivermouth / Honls provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Waiaha Rivermouth / Honls can be found by selecting the local surf guide option on the grey menu. Our Waiaha Rivermouth / Honls 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 (Waiaha Rivermouth / Honls) 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 Waiaha Rivermouth / Honls 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.

Waiaha Rivermouth / Honls is 95 km (59 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.