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Waiaha Rivermouth / Honls Surf Forecast
/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Waiaha Rivermouth / Honls surfForecast / HAW – Big Island / USA
16 Day Weather and Surf, issued 1 am Tuesday 19 May 2026 HSTForecast 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
26.5° C
(Which is 1.3°C warmer than 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 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (May 19) at 8AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.4m and 17s. Another secondary swell of 0.2m and 9s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Waiaha Rivermouth / Honls in the next 16 days are 0.8m 15s and forecast to arrive on Tuesday (May 19) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (May 20) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 19th May) | 2.5ft (0.7m) 14s |
| Best Surf | 8AM (Tue 19th May) | 2.5ft (0.7m) 14s |
| Most Powerful | 5PM (Tue 19th May) | 2.5ft (0.8m) 15s |
Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 17mm), heaviest on Tue night. Warm (max 27°C on Tue morning, min 24°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat afternoon. Warm (max 26°C on Fri afternoon, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
SSW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 18 | SSW 16 | S 16 | S 15 | S 15 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | |
180 | 242 | 160 | 156 | 102 | 203 | 186 | 161 | 157 | 115 | 148 | 190 | 236 | 212 | 200 | 132 | 181 | 86 | 85 | 85 | 86 | |
Wind (km/h) | |||||||||||||||||||||
on | cross | cross-on | cross-on | cross-on | glassy | on | cross | cross | cross-on | glassy | glassy | cross-on | glassy | glassy | on | glassy | cross | on | cross-on | cross-off | |
High Tide | 6:25PM0.74m | 6:41AM0.15m | 7:18PM0.69m | 8:07AM0.17m | 8:13PM0.63m | 9:40AM0.22m | 9:07PM0.56m | 10:58AM0.29m | 10:01PM0.49m | 11:57AM0.38m | 10:53PM0.43m | 12:44PM0.46m | 11:42PM0.36m | ||||||||
Low Tide | 10:37AM-0.05m | 2:14AM0.02m | 11:29AM0.01m | 3:10AM0.02m | 12:33PM0.07m | 3:58AM0.01m | 1:57PM0.13m | 4:40AM-0.01m | 3:38PM0.17m | 5:16AM-0.02m | 5:16PM0.19m | 5:48AM-0.03m | 6:41PM0.18m | ||||||||
 | |  |  | |  | |  |  | |  |  | | | | | | | | | | |
 | 5:47 | — | — | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — | 5:45 | — | — | 5:45 | — | — |
 | — | 6:52 | — | — | 6:53 | — | — | 6:53 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:55 | — |
2 | 2 | 6 | — | 2 | 3 | — | 2 | — | — | — | — | — | 2 | — | — | 1 | 1 | — | — | 1 | |
Temp °C | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 |
29 | 28 | 30 | 30 | 29 | 29 | 29 | 28 | 27 | 28 | 27 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 27 | |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | S 16 | S 15 | S 15 | SSW 14 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 |
 kJ | 180 | 242 | 160 | 156 | 102 | 203 | 186 | 161 | 157 | 115 | 148 | 190 | 236 | 212 | 200 | 132 | 181 | 86 | 85 | 85 | 86 |
Swell 2 Height (m) Direction Period (s) | SSW 17 | SW 18 | SSW 9 | SSW 18 | SSW 18 | SSW 13 | S 13 | SSW 12 | SSW 12 | S 18 | S 14 | S 13 | SE 12 | NNW 10 | NNW 10 | S 16 | NW 13 | S 15 | NW 12 | NW 11 | NW 11 |
| kJ | 99 | 12 | 17 | 62 | 102 | 56 | 30 | 29 | 56 | 99 | 93 | 89 | 5 | 11 | 10 | 20 | 6 | 39 | 5 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | SW 18 | NW 11 | SSW 16 | SSW 16 | SSW 14 | SE 14 | NW 9 | SSE 4 | SE 12 | SSE 12 | SSE 12 | NNW 11 | SSE 12 | S 11 | NW 15 | NW 10 | NW 10 | NNW 12 | — | — | S 19 |
| kJ | 49 | 5 | 25 | 25 | 38 | 7 | 13 | 4 | 6 | 14 | 14 | 11 | 13 | 2 | 8 | 4 | 4 | 14 | — | — | 7 |
Wind waves Height (m) Direction Period (s) | — | S 10 | — | SSW 9 | NW 3 | NW 9 | — | W 3 | — | SW 11 | SW 11 | — | W 11 | — | — | — | NW 3 | — | SSW 5 | WSW 2 | WSW 2 |
| kJ | — | 7 | — | 8 | 3 | 14 | — | 1 | — | 30 | 19 | — | 21 | — | — | — | 2 | — | 2 | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 119 | 1 | 119 | 19 | 0 | 6 | 1 | 0 | 132 | 0 | 0 | 154 | 0 | 0 | 19 | 0 | 19 | 100 | 19 | 0 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
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 16 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.
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