Surf Forecasts:
Waiaha Rivermouth / Honls surf forecast from 18 Sep 2026:
- Best quality surf: Sunday 20 Sep, 2AM (local time) - 3ft (0.9m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 20 Sep, 2AM (local time) - 3ft (0.9m), 16s period, SSW swell with 432 kJ wave energy.
- Next surfable swell (1★+): Saturday 19 Sep, 2AM (local time) - 2.5ft (0.8m), 16s period with SSW swell.
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 Saturday (Sep 19) at 2AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.5m and 16s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Waiaha Rivermouth / Honls in the next 16 days are 0.9m 16s and forecast to arrive on Sunday (Sep 20) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Sep 20) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 19th Sep) | 2.5ft (0.8m) 16s |
| Best Surf | 2AM (Sun 20th Sep) | 3ft (0.9m) 16s |
| Most Powerful | 2AM (Sun 20th Sep) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri afternoon. Warm (max 29°C on Fri morning, min 26°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Tue afternoon. Warm (max 28°C on Mon morning, min 27°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SW 17 | SW 17 | SSW 16 | S 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | S 12 | S 13 | S 13 | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 305 | 298 | 273 | 225 | 346 | 432 | 387 | 381 | 331 | 295 | 232 | 173 | 155 | 146 | 168 | 119 | 122 | 122 | 112 | 181 | 298 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross | cross-on | cross-off | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | on | glassy | cross-on | glassy | cross-off |
High Tide | 9:53AM0.60m | 9:42PM0.23m | 10:59AM0.61m | 11:23PM0.25m | 11:54AM0.63m | 00:21AM0.29m | 12:38PM0.65m | 1:04AM0.34m | 1:16PM0.66m | 1:41AM0.39m | 1:50PM0.65m | 2:16AM0.45m | 2:22PM0.62m | 2:51AM0.51m | |||||||
Low Tide | 6:15PM0.20m | 2:46AM0.16m | 6:54PM0.17m | 4:14AM0.16m | 7:22PM0.15m | 5:25AM0.15m | 7:47PM0.12m | 6:22AM0.13m | 8:10PM0.10m | 7:12AM0.11m | 8:32PM0.09m | 8:00AM0.10m | 8:53PM0.07m | ||||||||
 |  |  |  | |  | | |  | | | | |  |  | | | | | | | |
 | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — |
 | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — |
mm | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | 3 | 3 | — | 2 | — | — | 2 | 3 |
Temp °C | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 17 | SSW 16 | S 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | S 12 | S 13 | S 13 | S 12 | S 12 | S 12 | SW 15 | SW 17 |
| kJ | 305 | 298 | 273 | 225 | 346 | 432 | 387 | 381 | 331 | 295 | 232 | 173 | 155 | 146 | 168 | 119 | 108 | 75 | 72 | 181 | 298 |
Swell 2 Height (m) Direction Period (s) | S 16 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | W 12 | SW 14 | WNW 11 | W 13 | SW 19 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | S 12 | S 11 |
| kJ | 137 | 211 | 129 | 124 | 122 | 80 | 54 | 54 | 52 | 11 | 31 | 24 | 29 | 57 | 77 | 74 | 122 | 122 | 112 | 70 | 37 |
Swell 3 Height (m) Direction Period (s) | S 9 | SSE 4 | SSW 4 | SSW 15 | S 4 | S 12 | W 13 | NW 13 | W 12 | SSW 15 | WNW 11 | SW 14 | SSW 13 | W 12 | W 12 | W 11 | W 11 | W 10 | SSW 18 | SSW 18 | SSW 16 |
| kJ | 2 | 4 | 3 | 86 | 3 | 3 | 4 | 7 | 11 | 21 | 12 | 30 | 18 | 11 | 25 | 9 | 9 | 9 | 64 | 62 | 25 |
Wind waves Height (m) Direction Period (s) | WSW 9 | NW 4 | — | SW 9 | NW 3 | SW 3 | — | — | — | — | — | — | — | NW 2 | — | — | — | — | SSE 5 | NW 4 | — |
| kJ | 16 | 8 | — | 20 | 4 | 3 | — | — | — | — | — | — | — | 1 | — | — | — | — | 3 | 3 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 6 | 0 | 119 | 6 | 0 | 119 | 0 | 0 | 81 | 0 | 0 | 119 | 0 | 0 | 119 | 0 | 0 | 119 | 0 | 0 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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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