Surf Forecasts:
Chinamans Hat/Mokolii surf forecast from 9 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 2PM (local time) - 11ft (3.5m), 13s period, ENE swell with 3,641 kJ wave energy.
Best Forecast Surf Conditions for Chinamans Hat/Mokolii this week:
The most powerful waves expected at Chinamans Hat/Mokolii in the next 16 days are 3.5m 13s and forecast to arrive on Sunday (Aug 16) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Thursday (Aug 13) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 16th Aug) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Chinamans Hat/Mokolii over the next 16 days.
The Lowdown
Alright, let’s break it down. First ten days or so at Chinamans Hat/Mokolii are a total write-off. From Sunday the 9th through Sunday the 16th, it’s all cross-onshore wind, short period windswell, and choppy junk. Swell comes from the ENE, but this break really wants NE. The periods are 6 to 8 seconds, so no real power or shape. The combined energy goes from 265 up to 4506 by the 16th, but it’s all blown out. Water temp is about 80°F – normal for the season. Nothing worth paddling out for.
Then comes your one real shot. Monday the 17th of August, morning – that’s the standout. Wind shifts to the south at 9 mph, offshore and clean. Swell drops to 6ft but it’s from the NE with a 10-second period – real groundswell that’ll wrap into the point. Combined energy is 667, moderate but solid. The forecast calls for very good surf conditions. That NE swell matches what this break wants, and with glassy offshore wind, it’s your best window. Crowds are possible, so beat the rush.
After Monday morning, it’s back to marginal or poor through the 24th. Winds go cross-onshore, swell periods drop back to 7-8 seconds, and the energy fades. There’s some size on the 21st and 22nd – around 7 to 7ft – but it’s still cross-shore or onshore, so only marginal. No other session comes close to that Monday morning.
So here’s the deal: a long stretch of junk, then one clean Monday morning that’s the real deal. After that, it fades again. Make that one session count.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Warm (max 27°C on Mon morning, min 25°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | ENE 11 | ENE 11 | E 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 254 | 266 | 301 | 220 | 253 | 214 | 208 | 186 | 160 | 143 | 140 | 182 | 167 | 207 | 285 | 358 | 398 | 705 | 1132 | 1331 | 2103 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 1:07PM0.93m | 11:08PM0.39m | 1:44PM0.95m | 00:15AM0.44m | 2:17PM0.96m | 1:10AM0.48m | 2:48PM0.93m | 2:03AM0.52m | 3:16PM0.88m | 2:55AM0.54m | 3:39PM0.81m | 3:49AM0.56m | 3:57PM0.74m | 4:47AM0.57m | |||||||
Low Tide | 8:36PM0.31m | 6:15AM-0.12m | 8:46PM0.29m | 7:03AM-0.13m | 9:07PM0.26m | 7:48AM-0.10m | 9:32PM0.23m | 8:30AM-0.04m | 9:58PM0.19m | 9:11AM0.04m | 10:24PM0.16m | 9:51AM0.15m | 10:50PM0.12m | ||||||||
 |  |  |  | |  | | |  | | | | | | | | | | | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — |
mm | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 |
Temp °C | 26 | 26 | 25 | 27 | 27 | 26 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 27 | 27 | 26 | 29 | 28 | 28 | 28 | 27 | 26 | 25 | 25 | 24 | 25 | 27 | 24 | 24 | 25 | 25 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | NNW 11 | NNW 10 | NNW 9 | NNW 8 | NNW 8 | SSW 15 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | E 12 | E 13 |
| kJ | 17 | 23 | 33 | 27 | 24 | 13 | 42 | 40 | 62 | 155 | 152 | 257 | 183 | 161 | 159 | 106 | 106 | 96 | 85 | 319 | 2103 |
Swell 2 Height (m) Direction Period (s) | N 12 | S 18 | NE 9 | SSW 16 | SSW 15 | SSW 15 | NNW 8 | NNW 7 | S 20 | SSW 13 | SSW 13 | NNW 7 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | ESE 12 | NNW 9 | NNW 8 | S 13 | S 14 |
| kJ | 11 | 24 | 12 | 49 | 45 | 44 | 11 | 5 | 119 | 55 | 55 | 5 | 6 | 6 | 5 | 5 | 46 | 16 | 14 | 54 | 61 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSW 12 | S 16 | NE 8 | SSW 12 | SSE 9 | SSE 9 | SSE 9 | NNW 7 | NNW 7 | NNW 7 | SE 9 | S 9 | S 9 | S 18 | S 11 | NNW 8 | S 18 | S 20 | NNW 8 | NNW 8 |
| kJ | 9 | 15 | 20 | 11 | 14 | 8 | 8 | 8 | 5 | 5 | 5 | 3 | 2 | 2 | 6 | 2 | 6 | 6 | 7 | 13 | 12 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | ENE 11 | ENE 11 | NE 7 |
| kJ | 254 | 266 | 301 | 220 | 253 | 214 | 208 | 186 | 160 | 143 | 140 | 182 | 167 | 207 | 285 | 358 | 398 | 705 | 1132 | 1331 | 189 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 35 | 28 | 35 | 35 | 35 | 25 | 35 | 35 | 25 | 35 | 136 | 35 | 35 | 136 | 35 | 35 | 35 | 35 | 35 | 136 | 25 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Chinamans Hat/Mokolii Surf forecast
The above surf forecast table for Chinamans Hat/Mokolii provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Chinamans Hat/Mokolii can be found by selecting the local surf guide option on the grey menu. Our Chinamans Hat/Mokolii 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 (Chinamans Hat/Mokolii) 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 Chinamans Hat/Mokolii 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.
Chinamans Hat/Mokolii is 11 km (7 miles) from Kane'ohe. If you plan a vacation in Oahu, look for hotels and other accommodation in Kane'ohe. Kane'ohe has rooms for a wide range of budgets as well as car hire and transport links.
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