Surf Forecasts:
Waimanalo surf forecast from 12 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 2PM (local time) - 7ft (2.2m), 8s period, ENE swell with 531 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 2.2m 8s and forecast to arrive on Sunday (Jul 12) 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 0.3m 18s period and expected on Sunday (Jul 12) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 12th Jul) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
Alright folks, Rusty here. Let’s be straight with you. I’ve had a good look at the charts for Waimanalo over the next 16 days, and I gotta tell you, it’s a tough one.
Right from the get-go, starting Saturday the 11th of July, we’re looking at a solid 7 ft swell coming from the ENE, but it’s paired with a strong 22 mph onshore wind. That’s a recipe for choppy, blown-out conditions. The water temp is sitting at 79°, which is about average for the time of year, but it won’t feel like a nice day out there with that wind. The combined swell energy is moderate (389), but with that wind, it’s just messy.
Sunday the 12th and Monday the 13th are more of the same story. The swell hangs around 7 ft to 6 ft, but it’s still from the ENE with a period of just 7 to 8 seconds – that’s short period, wind-driven slop. The wind is onshore and strong, ranging from 19 to 25 mph. The energy is moderate (516 to 327), but the “poor surf conditions” label says it all. This isn’t the kind of surf you paddle out for; it’s more of a kite-surfing setup.
Tuesday the 14th through to the end of the second week doesn’t get much better. The swell drops a bit, between 4 ft and 6 ft, but it’s still mostly ENE, and the wind stays onshore or cross-onshore from the ENE or E. The period rarely gets above 8 seconds. The energy fluctuates from weak (114) to moderate (495), but every single session is marked as “poor surf conditions.” The swell direction is ENE, which is not the optimum for Waimanalo (that’s NE), so it’s not lining up well.
There are some mornings with lighter winds, like Wednesday the 15th with a gentle breeze, but it’s cross-onshore, and the swell is small and weak. Thursday the 23rd through the 26th sees a bit of a drop in wind speed, but we’re still looking at onshore ENE winds and waist-high, weak, short-period waves.
Honestly, the whole 16-day window is a blank. There’s not a single standout session. The swell is too wind-affected, the power is low, and the direction is wrong. For a spot that’s fairly consistent, this is a rough run. Don’t bother packing the board for a while; forecasts can change, but right now, it’s a solid no-go.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat afternoon, min 24°C on Sat night). Mainly strong winds. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Wed morning. Warm (max 25°C on Tue afternoon, min 24°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Sat 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | NNE 7 | NE 8 | NE 7 | ENE 7 | NE 7 | NE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 389 | 397 | 516 | 501 | 468 | 373 | 327 | 249 | 178 | 236 | 223 | 139 | 171 | 176 | 142 | 127 | 186 | 209 | 186 | 241 | 163 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | on | on |
High Tide | 10:48PM0.30m | 2:34PM0.75m | 00:11AM0.30m | 3:15PM0.77m | 1:17AM0.31m | 3:55PM0.76m | 2:18AM0.32m | 4:33PM0.73m | 3:19AM0.32m | 5:06PM0.69m | 4:23AM0.32m | 5:34PM0.63m | 5:36AM0.33m | ||||||||
Low Tide | 9:11PM0.25m | 6:26AM-0.14m | 9:32PM0.24m | 7:16AM-0.15m | 10:02PM0.22m | 8:04AM-0.15m | 10:36PM0.21m | 8:49AM-0.11m | 11:10PM0.19m | 9:34AM-0.06m | 11:44PM0.16m | 10:16AM0.02m | 00:18AM0.13m | 10:57AM0.11m | |||||||
 |  | |  | | | | | | |  |  | |  | | | | | | | | |
 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 |
 | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | 7:15 |
mm | — | — | — | — | — | — | — | — | — | — | 4 | 5 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 24 | 25 | 24 | 24 | 24 | 24 | 24 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 25 |
Feels °C | 23 | 23 | 21 | 22 | 20 | 21 | 21 | 21 | 22 | 23 | 23 | 26 | 25 | 24 | 26 | 24 | 24 | 23 | 23 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SW 18 | SW 16 | SW 16 | SW 16 | SSW 15 | SSW 15 | N 8 | NNE 7 | NE 8 | SSW 17 | NNE 8 | SSW 18 | NE 7 | SSE 9 | NNE 7 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 |
| kJ | 30 | 48 | 41 | 40 | 39 | 23 | 21 | 12 | 178 | 164 | 29 | 62 | 31 | 176 | 7 | 29 | 21 | 25 | 49 | 42 | 37 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 13 | S 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSW 14 | SSW 14 | E 8 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 16 | SSE 8 | SSE 8 | SE 7 | SSE 8 | SE 9 | SE 9 |
| kJ | 11 | 13 | 13 | 14 | 14 | 14 | 13 | 20 | 19 | 74 | 16 | 16 | 14 | 48 | 25 | 13 | 6 | 2 | 6 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | S 14 | — | W 13 | — | W 12 | S 20 | SW 21 | SSE 11 | SSW 19 | SSW 14 | W 16 | SSW 18 | SSE 10 | SSE 9 | SSW 13 | SSW 17 | S 18 | SW 16 | W 14 | W 14 | W 13 |
| kJ | 4 | — | 3 | — | 3 | 8 | 17 | 12 | 36 | 18 | 5 | 30 | 10 | 8 | 17 | 29 | 24 | 10 | 4 | 4 | 3 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | E 8 | NE 8 | NE 7 | ENE 7 | NE 7 | — | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 389 | 397 | 516 | 501 | 468 | 373 | 327 | 249 | 100 | 236 | 223 | 139 | 171 | — | 142 | 127 | 186 | 209 | 186 | 241 | 163 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 50 | 50 | 50 | 52 | 44 | 44 | 50 | 15 | 18 | 18 | 44 | 9 | 44 | 15 | 44 | 15 | 44 | 45 | 50 | 44 | 44 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Waimanalo Surf forecast
The above surf forecast table for Waimanalo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanalo can be found by selecting the local surf guide option on the grey menu. Our Waimanalo 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 (Waimanalo) 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 Waimanalo 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.
Waimanalo is 7 km (4 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.
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