Surf Forecasts:
Kailua Beach surf forecast from 15 Sep 2026:
- Most powerful swell: Tuesday 22 Sep, 5AM (local time) - 8ft (2.5m), 9s period, E swell with 973 kJ wave energy.
Best Forecast Surf Conditions for Kailua Beach this week:
The most powerful waves expected at Kailua Beach in the next 16 days are 2.5m 9s and forecast to arrive on Tuesday (Sep 22) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 19s period and expected on Wednesday (Sep 16) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Tue 22nd Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, let’s talk about what we got. The next couple of weeks are a story of two halves. The first half is a real struggle, with strong onshore winds and a lot of stormy, lumpy water. It’s not worth paddling out for the first seven or eight days. After that, things get interesting.
The real window, the one that’s worth looking at, is the 24th and 25th of September. Kailua Beach (Oahu) is where you wanna be. On the morning of the 24th, it’s glassy. Absolutely dead flat calm. The swell is a solid 8ft from the east, and that’s gonna produce some clean, long lines. The energy is strong (around 984), so there’s plenty of push. The afternoon picks up to about 8ft, still with light wind, so it stays rideable.
The 25th is even better. Morning is glassy with a 7ft swell from the east (752 energy). The afternoon gets glassy again, with a 8ft swell from the ENE (823 energy). This is a proper two-day window of clean, groomed surf. The water temperature is 81°, which is average for the time of year, so no wetsuit needed. The swell period is 10 seconds on the best days, so you get good shape on this point break.
The whole first week is a write-off with fresh onshore winds and nasty conditions. From the 26th, the wind comes back onshore and the swell drops off. So, if you’re looking for a window, it’s the 24th and 25th of September. That’s your best bet.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Thu night. Warm (max 26°C on Tue morning, min 25°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri morning, min 25°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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) | NNE 8 | NE 8 | NNE 8 | ENE 6 | NE 6 | NE 7 | ENE 7 | E 9 | ENE 8 | ENE 7 | E 8 | E 8 | ENE 8 | E 8 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 51 | 82 | 74 | 123 | 171 | 230 | 475 | 553 | 584 | 532 | 471 | 558 | 473 | 522 | 447 | 420 | 456 | 468 | 534 | 678 | 951 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on |
High Tide | 3:27PM0.55m | 6:09AM0.67m | 3:00PM0.53m | 7:35AM0.64m | 9:58AM0.64m | 11:15AM0.68m | 11:53AM0.71m | 11:00PM0.37m | 12:20PM0.75m | 11:52PM0.43m | |||||||||||
Low Tide | 11:06AM0.45m | 10:26PM0.15m | 12:06PM0.50m | 10:52PM0.18m | 11:26PM0.21m | 00:33AM0.25m | 3:03AM0.26m | 7:51PM0.34m | 4:34AM0.24m | 7:28PM0.32m | |||||||||||
 |  |  | | | |  | | | | |  | | | | | |  | | | | |
 | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — |
mm | — | — | 2 | — | — | 2 | 2 | 2 | 7 | — | — | — | — | — | — | — | — | — | — | 1 | 3 |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 28 | 28 | 27 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 24 | 25 | 25 | 24 | 23 | 24 | 23 | 23 | 24 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | E 12 | NNE 8 | E 10 | E 10 | E 10 | SSW 16 | NNE 7 | SSW 18 | SSW 17 | SW 17 | SSW 15 | SW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 |
| kJ | 51 | 44 | 50 | 51 | 73 | 96 | 25 | 84 | 124 | 116 | 71 | 44 | 62 | 48 | 86 | 79 | 74 | 71 | 67 | 61 | 58 |
Swell 2 Height (m) Direction Period (s) | E 12 | SSW 20 | E 11 | SW 18 | SW 18 | SW 17 | SSW 19 | SW 16 | S 10 | S 10 | SE 8 | SSW 16 | S 18 | S 18 | SW 15 | N 11 | N 11 | N 10 | N 10 | N 13 | NNW 12 |
| kJ | 26 | 37 | 37 | 80 | 79 | 76 | 37 | 40 | 2 | 2 | 2 | 26 | 25 | 25 | 8 | 2 | 9 | 8 | 8 | 4 | 29 |
Swell 3 Height (m) Direction Period (s) | SW 20 | ENE 8 | SW 19 | N 9 | SW 11 | SW 11 | S 11 | SSW 19 | NW 12 | NW 10 | S 21 | S 19 | S 9 | SSE 7 | S 13 | NW 9 | S 8 | NW 8 | NW 8 | N 10 | NNW 9 |
| kJ | 60 | 6 | 95 | 2 | 5 | 5 | 2 | 36 | 6 | 4 | 9 | 29 | 2 | 5 | 3 | 3 | 1 | 3 | 3 | 2 | 8 |
Wind waves Height (m) Direction Period (s) | ENE 4 | NE 8 | ENE 5 | ENE 6 | NE 6 | NE 7 | ENE 7 | E 9 | ENE 8 | ENE 7 | E 8 | E 8 | ENE 8 | E 8 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | E 9 |
| kJ | 18 | 82 | 74 | 123 | 171 | 230 | 475 | 553 | 584 | 532 | 471 | 558 | 473 | 522 | 447 | 420 | 456 | 468 | 534 | 678 | 951 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 17 | 17 | 41 | 41 | 18 | 41 | 43 | 41 | 46 | 48 | 41 | 46 | 48 | 42 | 48 | 48 | 42 | 46 | 48 | 41 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Kailua Beach Surf forecast
The above surf forecast table for Kailua Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kailua Beach can be found by selecting the local surf guide option on the grey menu. Our Kailua Beach 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 (Kailua Beach) 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 Kailua Beach 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.
Kailua Beach is 0 km (0 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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