Surf Forecasts:
Waiaha Rivermouth / Honls surf forecast from 15 Sep 2026:
- Best quality surf: Friday 18 Sep, 2AM (local time) - 2ft (0.6m), 18s period, SW swell with glassy winds.
- Most powerful swell: Saturday 19 Sep, 2PM (local time) - 3ft (0.9m), 17s period, SSW swell with 423 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 2AM (local time) - 1.5ft (0.4m), 21s period with SW 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 Tuesday (Sep 15) at 2AM. The primary swell is predicted to be 0.4m and 21s period with a secondary swell of 0.4m and 13s. 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 0.9m 17s and forecast to arrive on Saturday (Sep 19) at 2PM. 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 3s period and expected on Friday (Sep 18) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 15th Sep) | 1.5ft (0.4m) 21s |
| Best Surf | 2AM (Fri 18th Sep) | 2ft (0.6m) 18s |
| Most Powerful | 2PM (Sat 19th Sep) | 3ft (0.9m) 17s |
Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what’s on the cards for Honls. It’s gonna be a quiet run, with mostly small, marginal surf for the foreseeable future. We’ve got a long stretch ahead where it’s not really gonna fire, so patience is the name of the game.
The water temp is sitting at a warm 82°, which is about 2° warmer than usual for this time of year, so you'll be comfortable in boardshorts.
We kick off on Monday the 14th, but honestly, it’s pretty grim. A tiny 1ft SW swell is showing up with a very long period of 22 seconds, but the wind is a light cross-on from the WNW. The combined energy is weak (175), and conditions are poor. There’s just nothing to get excited about here.
Through Tuesday the 15th and into the rest of the week, we’re stuck in a rut. The swell stays small, barely pushing 2ft, and the wind is mostly onshore or cross-on. A lot of these mornings and afternoons are marked as poor or marginal. The period is dropping, too, losing that groundswell quality.
There is a tiny glimmer on Sunday the 20th afternoon. The swell is still only 3ft from the SSW, but the wind goes glassy from the WNW. That’s the one small window in this first week where you might find a clean, tiny wave at this reef setup, but it’s not going to have any power.
The second week doesn’t offer much of an upgrade. Tuesday the 22nd afternoon has another glassy moment with a 2ft S swell, but the energy is still low (219). We keep seeing these glassy windows, like on Saturday the 27th afternoon and Sunday the 28th afternoon, but the swell is tiny and weak.
Honestly, for the next 16 days, there’s no standout period. The swell is just too small and weak to make the long trek out to the reef worthwhile. The best you can hope for is a glassy morning or afternoon with a knee-high wave. It’s a quiet spell.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue afternoon. Warm (max 28°C on Tue morning, min 26°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 19mm), heaviest on Fri afternoon. Warm (max 28°C on Thu afternoon, min 26°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 22 | SW 21 | SW 20 | SSW 19 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 18 | SW 17 | SW 17 | SSW 15 | S 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 118 | 117 | 309 | 251 | 372 | 319 | 316 | 288 | 212 | 261 | 246 | 305 | 298 | 270 | 225 | 371 | 346 | 387 | 360 | 322 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-on | on | cross | cross-on | on | cross-off | on | cross | glassy | on | cross | cross | cross | cross-on | cross-off | cross-on | glassy | glassy |
High Tide | 5:21PM0.39m | 6:39AM0.60m | 5:51PM0.33m | 7:34AM0.60m | 6:28PM0.28m | 8:40AM0.59m | 7:35PM0.24m | 9:53AM0.60m | 9:42PM0.23m | 10:59AM0.61m | 11:23PM0.25m | 11:54AM0.63m | 00:21AM0.29m | |||||||
Low Tide | 11:27PM0.08m | 1:32PM0.23m | 11:56PM0.09m | 3:07PM0.25m | 00:32AM0.12m | 5:02PM0.23m | 1:25AM0.14m | 6:15PM0.20m | 2:46AM0.16m | 6:54PM0.17m | 4:14AM0.16m | 7:22PM0.15m | ||||||||
 |  | |  |  | | | | | |  |  | | |  | | | | | | |
 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 6:27 | — | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — |
mm | — | — | — | 1 | 1 | — | — | — | — | — | 4 | 2 | 5 | 6 | — | 1 | 1 | — | — | — |
Temp °C | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 27 | 27 | 27 | 26 |
Feels °C | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 31 | 32 | 31 | 31 | 31 | 29 | 30 | 31 | 30 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 22 | SW 21 | SW 20 | SSW 19 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 18 | SW 17 | SW 17 | SSW 15 | S 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 |
| kJ | 118 | 117 | 309 | 251 | 372 | 319 | 316 | 288 | 206 | 261 | 246 | 305 | 298 | 270 | 225 | 371 | 346 | 387 | 360 | 322 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 12 | SW 8 | SSW 12 | SSW 11 | WSW 8 | SSW 19 | SSW 18 | SSW 18 | S 16 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 |
| kJ | 49 | 44 | 41 | 38 | 17 | 13 | 12 | 7 | 212 | 110 | 246 | 137 | 211 | 129 | 124 | 122 | 79 | 54 | 54 | 52 |
Swell 3 Height (m) Direction Period (s) | WSW 9 | WSW 9 | WSW 9 | WSW 9 | SW 12 | WSW 8 | WNW 10 | SSW 11 | SW 10 | WSW 8 | SE 4 | WSW 9 | NW 3 | S 4 | SSW 15 | S 8 | S 10 | W 14 | W 13 | W 12 |
| kJ | 8 | 8 | 8 | 7 | 23 | 7 | 10 | 12 | 25 | 14 | 1 | 16 | 3 | 2 | 86 | 6 | 2 | 4 | 3 | 12 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | WSW 7 | — | — | — | — | W 8 | — | — | WNW 9 | — | W 9 | W 8 | — | — | — |
| kJ | — | — | — | — | — | 4 | — | — | — | — | 22 | — | — | 16 | — | 6 | 12 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 81 | 0 | 47 | 47 | 47 | 47 | 19 | 0 | 96 | 47 | 0 | 47 | 45 | 1 | 100 | 6 | 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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