Surf Forecasts:
Waiaha Rivermouth / Honls surf forecast from 2 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 5AM (local time) - 7ft (2.2m), 14s period, WSW swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 11AM (local time) - 8ft (2.5m), 14s period, WSW swell with 2,991 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 5PM (local time) - 3ft (0.9m), 15s 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 Wednesday (Sep 02) at 5PM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.3m and 11s. Another secondary swell of 0.2m and 7s 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 2.5m 14s and forecast to arrive on Tuesday (Sep 08) at 11AM. 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 Friday (Sep 04) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Wed 2nd Sep) | 3ft (0.9m) 15s |
| Best Surf | 5AM (Tue 8th Sep) | 7ft (2.2m) 14s |
| Most Powerful | 11AM (Tue 8th Sep) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.
The Lowdown
Hey folks, Rusty here, talking about Waiaha Rivermouth / Honls.
It’s a reef break for the advanced crew, and it’s fairly consistent once it turns on. Water temp is about 82°, right where it should be for this time of year.
The first few days are nothing to write home about. Wednesday the 2nd through the weekend has small S to SSW swell, from about 3ft to 5ft. Winds are mostly cross-onshore, so the surface is a bit bumpy. The energy is moderate, not much power behind it. There's a chance of thunderstorms on Sunday the 6th.
The real standout shows up on Monday, September 7th. The afternoon turns glassy with a clean 4ft SSW groundswell rolling in at a solid 16-second interval. The wind goes cross-offshore, and the energy jumps to a strong 1201. The reef will be cranking out some beautiful, powerful lines. This is the best session of the whole outlook, but it can get crowded here sometimes.
Tuesday the 8th brings a serious spike: 8ft from the WSW, with a massive combined energy of 4210. The wind stays clean and cross-offshore, but at that size, it’s strictly for experts. The break will be big, gnarly, and not for the faint of heart.
After that, it dries up fast. From Wednesday the 9th onwards, the swell drops to tiny leftovers, mostly under 2ft with poor conditions. There’s a long stretch of flat, unrideable days where the energy drops into the triple digits. Even when the period hits 24 seconds on the 14th, with only 0.7ft of swell, there’s nothing to catch.
So here’s the take: Skip the first week. Saturday the 6th is a no-go. Aim for Monday the 7th for the cleanest, best shaped SSW groundswell. Tuesday the 8th for the big-wave crew. Then it’s flat for a while.
Catch ya in the water,
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Wed morning, min 26°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 28°C on Mon afternoon, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | S 16 | SSW 15 | S 15 | S 14 | S 13 | S 13 | SSW 13 | SSW 13 | SSW 11 | SSW 11 | SSW 11 | SW 12 | SW 11 | SW 11 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | WSW 14 | WSW 13 | WSW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 507 | 380 | 272 | 264 | 507 | 749 | 273 | 572 | 477 | 592 | 517 | 604 | 466 | 437 | 433 | 603 | 568 | 1106 | 2991 | 1703 | 494 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | cross-on | cross-on | glassy | cross-on | on | cross-off | on | cross | on | cross-on | on | glassy | cross | cross-off | off | cross | cross-off | cross-off |
High Tide | 6:49PM0.30m | 9:11AM0.64m | 8:01PM0.25m | 10:28AM0.67m | 10:02PM0.22m | 11:36AM0.71m | 11:43PM0.24m | 12:34PM0.74m | 00:51AM0.28m | 1:22PM0.76m | 1:42AM0.34m | 2:05PM0.75m | 2:27AM0.40m | ||||||||
Low Tide | 3:06PM0.25m | 1:09AM0.06m | 5:13PM0.23m | 2:10AM0.07m | 6:36PM0.18m | 3:30AM0.08m | 7:23PM0.13m | 4:53AM0.08m | 7:59PM0.10m | 6:05AM0.06m | 8:31PM0.08m | 7:06AM0.05m | 9:00PM0.06m | ||||||||
 | |  | |  |  | | | | | | | |  |  | | | | |  | | |
 | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:32 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — | — | 1 | 7 |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 28 | 28 | 29 | 29 | 28 |
Feels °C | 31 | 31 | 31 | 30 | 31 | 31 | 30 | 31 | 29 | 30 | 30 | 29 | 30 | 30 | 31 | 31 | 31 | 33 | 32 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | S 16 | SSW 15 | S 15 | S 14 | S 13 | S 13 | S 10 | SSW 13 | SSW 11 | SSW 11 | SSW 11 | SW 12 | SW 11 | SW 11 | SW 11 | SW 12 | WSW 12 | WSW 13 | WSW 14 | WSW 13 | SSW 10 |
| kJ | 507 | 380 | 272 | 264 | 507 | 749 | 198 | 572 | 477 | 592 | 517 | 604 | 466 | 437 | 382 | 425 | 554 | 1093 | 2991 | 1703 | 494 |
Swell 2 Height (m) Direction Period (s) | W 11 | S 11 | SSE 14 | SSE 12 | WNW 9 | WNW 9 | SSW 13 | NW 10 | S 10 | S 12 | SSW 18 | SSW 16 | S 12 | SSW 19 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 11 | WSW 11 |
| kJ | 9 | 20 | 71 | 115 | 8 | 8 | 273 | 4 | 47 | 26 | 63 | 107 | 45 | 360 | 433 | 603 | 568 | 1106 | 1204 | 505 | 485 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | W 10 | S 10 | WNW 9 | — | SW 18 | NW 9 | SSW 20 | SSW 20 | SSW 18 | S 12 | S 12 | SSW 20 | S 11 | S 11 | S 9 | S 9 | N 13 | SW 20 | SSW 14 | SSW 14 |
| kJ | 17 | 8 | 17 | 8 | — | 12 | 3 | 38 | 37 | 63 | 27 | 46 | 128 | 21 | 21 | 55 | 79 | 3 | 15 | 459 | 346 |
Wind waves Height (m) Direction Period (s) | WSW 7 | WSW 7 | — | — | — | — | — | NW 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 5 | 5 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 122 | 0 | 0 | 132 | 19 | 0 | 119 | 19 | 0 | 47 | 45 | 6 | 47 | 38 | 0 | 47 | 0 | 0 | 71 | 19 | 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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