Surf Forecasts:
Kewalos surf forecast from 18 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 5AM (local time) - 3ft (0.9m), 15s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 23 Jul, 2AM (local time) - 4.5ft (1.4m), 13s period, ENE swell with 576 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 5AM (local time) - 3ft (0.9m), 15s period with S swell.
Best Forecast Surf Conditions for Kewalos this week:
The surf forecast for Kewalos over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 21) at 5AM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.4m and 16s. Another secondary swell of 1.1m and 7s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kewalos in the next 16 days are 1.4m 13s and forecast to arrive on Thursday (Jul 23) 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 13s period and expected on Friday (Jul 17) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 21st Jul) | 3ft (0.9m) 15s |
| Best Surf | 5AM (Tue 21st Jul) | 3ft (0.9m) 15s |
| Most Powerful | 2AM (Thu 23rd Jul) | 4.5ft (1.4m) 13s |
Table - best surf conditions forecast for Kewalos over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s coming up at Kewalos. This is a reef break, advanced only, and it’s consistent – but the next couple of weeks are a real mixed bag. We’ve got a long stretch of poor to marginal conditions right off the bat, with very little worth paddling out for. The water is sitting at 79.5°, which is pretty much average for this time of year – nothing weird there.
The first few days are a write-off. Friday July 17 through Sunday July 19, the swell is small and messy, with wave heights around 2.0 ft to 6.6 ft but all under a stiff cross-off wind from the ENE at 16-22 mph. The combined energy is weak to moderate (310-604), and the period is short – 6-8 seconds – so it’s just junky. No tide, no shape. Honestly, forget it.
Monday July 20 we start to see a slight improvement – still marginal, but the swell direction shifts to S with a longer period of 16 seconds on the afternoon. Wave height drops to 2.6 ft, but the energy jumps to 595 (moderate). Still cross-off wind, still not great. Tuesday July 21 and Wednesday July 22 are similar: small S/SSW swell, long period (14-24 seconds),
Short Range ForecastMostly dry. Warm (max 27°C on Fri afternoon, min 24°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 24°C on Mon night). Mainly fresh winds. | |||||||||||||||||||
Fri 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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) | SSW 16 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 15 | S 14 | S 14 | S 13 | ENE 7 | SSW 23 | ENE 13 | SSW 20 | SSW 20 | SSW 18 |
Wave Graph  | ||||||||||||||||||||
 kJ | 196 | 166 | 335 | 426 | 373 | 310 | 238 | 257 | 191 | 321 | 339 | 329 | 307 | 273 | 149 | 426 | 576 | 412 | 395 | 464 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:36PM0.61m | 7:44AM0.34m | 7:11PM0.52m | 8:53AM0.38m | 7:45PM0.43m | 10:04AM0.43m | 8:19PM0.34m | 11:13AM0.49m | 8:56PM0.27m | 12:12PM0.54m | 10:06PM0.22m | 1:02PM0.59m | 11:46PM0.19m | |||||||
Low Tide | 1:42AM0.01m | 12:46PM0.16m | 2:15AM0.02m | 2:03PM0.22m | 2:48AM0.03m | 3:52PM0.27m | 3:23AM0.04m | 6:20PM0.26m | 4:02AM0.05m | 8:25PM0.21m | 9:13PM0.17m | |||||||||
 |  | | |  | | | | | | | | | | | | | | | | |
 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — |
 | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 25 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 25 | 24 | 22 | 23 | 23 | 22 | 24 | 23 | 25 | 24 | 24 | 25 | 26 | 24 | 24 | 24 | 24 | 22 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 14 | SSW 13 | SSW 14 | SSW 14 | S 12 | SSW 13 | SSW 12 | S 14 | S 16 | S 15 | S 14 | S 14 | ENE 7 | S 13 | SSW 23 | ENE 13 | SSW 20 | SSW 20 | SSW 18 |
| kJ | 196 | 147 | 141 | 158 | 158 | 73 | 95 | 44 | 142 | 321 | 339 | 329 | 307 | 108 | 126 | 426 | 576 | 412 | 395 | 464 |
Swell 2 Height (m) Direction Period (s) | W 14 | W 13 | WNW 13 | WNW 13 | W 13 | S 19 | S 18 | S 18 | S 16 | SW 18 | SW 16 | SW 17 | E 11 | S 13 | S 11 | S 13 | S 13 | E 12 | E 11 | S 11 |
| kJ | 98 | 90 | 57 | 56 | 28 | 66 | 106 | 97 | 135 | 81 | 69 | 72 | 40 | 273 | 83 | 125 | 157 | 139 | 125 | 56 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SW 15 | SW 15 | SSE 9 | SSE 9 | SSE 6 | NNE 8 | NE 8 | SW 18 | W 12 | E 12 | E 12 | SW 16 | E 12 | E 12 | S 10 | SSW 22 | S 12 | S 11 | S 13 |
| kJ | 55 | 58 | 55 | 7 | 7 | 7 | 12 | 15 | 83 | 11 | 12 | 25 | 67 | 68 | 95 | 56 | 363 | 67 | 91 | 85 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 |
| kJ | 150 | 166 | 335 | 426 | 373 | 310 | 238 | 257 | 191 | 193 | 173 | 108 | 117 | — | 149 | 121 | 139 | 160 | 139 | 342 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 36 | 28 | 36 | 36 | 31 | 28 | 129 | 28 | 1 | 28 | 1 | 1 | 28 | 28 | 28 | 29 | 1 | 28 | 38 | 28 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Kewalos Surf forecast
The above surf forecast table for Kewalos provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kewalos can be found by selecting the local surf guide option on the grey menu. Our Kewalos 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 (Kewalos) 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 Kewalos 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.
Kewalos is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.
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