Surf Forecasts:
Kailua Beach surf forecast from 15 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 2AM (local time) - 6ft (1.8m), 8s period, E swell with 391 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 1.8m 8s and forecast to arrive on Sunday (Jul 19) at 2AM. 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 16s period and expected on Monday (Jul 20) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 19th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Kailua Beach has in store for us over the next couple of weeks. I gotta be straight with you – it’s a rough stretch for paddle surfing. The whole 16-day window is a blank run with no good options. That’s a long gap from Wednesday July 15th all the way through Thursday July 30th. The swell energy (combined energy of all swells directed here) starts weak around 134 and builds into the high hundreds and even 800-plus by July 26th and 27th, but that doesn’t matter for us. The problem is the wind.
For the first week, it’s mostly cross-onshore or onshore from the E and ENE, blowing 9 to 16 mph, making things choppy and messy. The swell is short-period, usually 6 to 8 seconds – that’s windswell junk. Heights hover around 3 to 5 ft, but with that wind, it’s just a washing machine. Even on Friday July 17th when the wind goes onshore, the surf stays poor. The water temp is 79°, which is dead normal for this time of year, so no surprises there.
Into the second week, the swell period starts to stretch out – we see 11, 14, even 16 seconds on Sunday July 26th and Monday July 27th. The energy jumps way up (714 and 819), but it’s still accompanied by those moderate cross-onshore to onshore winds from the ENE at 12 to 16 mph. That long-period groundswell would be better at a point break or reef, but here at Kailua Beach, it’s just gonna break straight and stay messy. The best we get is onshore wind states, and the wave comment stays “poor surf conditions” right through.
For a spot like this that’s fairly consistent, it’s unusual to see such a long dry spell. But with no offshore winds, no clean conditions, and all that chop, there’s just nothing to recommend. If the wind ever shifts light offshore, things could change quick – but until then, I’d leave the board at home. This setup looks more interesting for kite surfing than paddle surfing, given the consistent breeze and building swell energy.
Stay tuned – forecasts can shift. Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed morning. Warm (max 25°C on Wed morning, min 24°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat morning. Warm (max 25°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 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) | ENE 7 | ENE 7 | NE 7 | ENE 7 | E 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | E 6 | E 6 | E 8 | E 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | NE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 105 | 89 | 176 | 147 | 108 | 195 | 154 | 170 | 135 | 91 | 143 | 391 | 301 | 284 | 130 | 142 | 150 | 109 | 123 | 159 | 147 |
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-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | on | cross-on | on | cross-on |
High Tide | 4:09PM0.95m | 3:20AM0.49m | 4:41PM0.89m | 4:16AM0.50m | 5:09PM0.83m | 5:18AM0.51m | 5:32PM0.75m | 6:30AM0.52m | 5:48PM0.68m | 8:04AM0.54m | 5:54PM0.61m | 10:10AM0.59m | 5:15PM0.56m | ||||||||
Low Tide | 8:40AM-0.00m | 10:56PM0.31m | 9:22AM0.06m | 11:27PM0.29m | 10:03AM0.16m | 11:59PM0.27m | 10:43AM0.26m | 00:30AM0.24m | 11:24AM0.37m | 1:03AM0.23m | 12:17PM0.48m | 1:41AM0.22m | 2:38PM0.55m | 2:27AM0.21m | |||||||
 |  |  | | |  |  | | | | |  | | | | | | | | | | |
 | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — |
mm | 1 | — | — | — | — | 1 | — | — | 1 | 2 | — | — | — | — | 1 | — | — | — | — | — | 3 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 24 |
Feels °C | 26 | 26 | 26 | 26 | 24 | 25 | 25 | 25 | 23 | 25 | 25 | 25 | 23 | 22 | 23 | 25 | 25 | 24 | 25 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | NNE 8 | SSW 16 | SSW 16 | NNE 7 | SSW 14 | SSW 16 | SSW 16 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 7 | S 19 | E 8 | S 16 | S 16 | S 15 | E 13 | E 12 | E 12 |
| kJ | 105 | 65 | 48 | 25 | 42 | 18 | 50 | 49 | 28 | 37 | 34 | 32 | 29 | 27 | 130 | 47 | 81 | 107 | 123 | 110 | 71 |
Swell 2 Height (m) Direction Period (s) | N 8 | SSE 10 | SSE 8 | SSW 13 | SSW 17 | SSW 17 | SW 16 | SSE 7 | SSW 14 | ESE 7 | SSW 14 | SSW 12 | SSW 12 | SSW 12 | NNE 8 | S 13 | E 16 | E 15 | S 14 | S 14 | S 14 |
| kJ | 29 | 9 | 7 | 17 | 29 | 30 | 10 | 5 | 41 | 17 | 39 | 30 | 15 | 15 | 48 | 31 | 46 | 67 | 103 | 97 | 89 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 18 | W 16 | W 15 | SSW 13 | SSE 10 | SE 7 | W 14 | S 10 | SSW 14 | NE 8 | S 21 | S 19 | S 6 | S 18 | E 18 | SW 18 | ESE 8 | ESE 7 | SW 16 | SSE 6 |
| kJ | 16 | 30 | 19 | 17 | 16 | 10 | 2 | 4 | 2 | 36 | 3 | 8 | 29 | 1 | 55 | 24 | 13 | 19 | 18 | 11 | 4 |
Wind waves Height (m) Direction Period (s) | — | ENE 7 | NE 7 | ENE 7 | E 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | E 6 | E 6 | E 8 | E 8 | ENE 8 | NE 6 | ENE 8 | ENE 8 | NE 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | — | 89 | 176 | 147 | 108 | 195 | 154 | 170 | 135 | 91 | 143 | 391 | 301 | 284 | 25 | 142 | 150 | 109 | 120 | 159 | 147 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 41 | 41 | 42 | 41 | 41 | 41 | 41 | 18 | 41 | 43 | 41 | 41 | 41 | 17 | 17 | 41 | 17 | 41 | 46 | 41 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.
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