Surf Forecasts:
In Betweens surf forecast from 9 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 8ft (2.4m), 11s period, ENE swell with 1,316 kJ wave energy.
Best Forecast Surf Conditions for In Betweens this week:
The most powerful waves expected at In Betweens in the next 16 days are 2.4m 11s and forecast to arrive on Sunday (Aug 16) 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 1.5m 6s period and expected on Wednesday (Aug 12) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 16th Aug) | 8ft (2.4m) 11s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, let’s break it down in feet and miles per hour. The whole 16-day stretch is pretty quiet for In Betweens, which is the only break in the mix here. It’s a beginner reef, fairly consistent, exposed to swell, but most days just don’t come together.
Sunday the 9th of August kicks off with 5ft swell from the ENE, period around 7 seconds, and a cross-off wind at 19 mph. The combined energy is moderate at 555, but the surf quality is poor—nothing worth paddling out for. This pattern holds through Monday, Tuesday, Wednesday, and Thursday: similar wind, small swell, all low scores. A longer-period groundswell shows up Wednesday and Thursday (18 seconds, from the S), heights around 3ft to 4ft, energy climbing into the 800s and 900s, but still marginal with cross-off wind.
Friday the 14th stays marginal. Saturday the 15th brings a bump to 7ft from the ENE, period 9–10 seconds, energy hits 1002 and 1182 (strong). But the wind stays cross-off, and the quality is still poor.
Now for the one real standout: Sunday the 16th of August. That morning we get 7ft from the ENE, period 11 seconds, and the wind swings north at 12 mph going offshore. Combined energy jumps to 2519 (very strong). This is excellent surf for experienced surfers. The afternoon holds 8ft ENE swell with a 13-second period, light northwesterly cross-off at 6 mph, energy at 2745. That 2.5m is about 8ft—expert level. The long-period groundswell will have power and shape, and the offshore morning makes for clean faces. Water temp is about average for this time of year.
Monday the 17th turns onshore from the south, and quality drops. Tuesday the 18th has a small 2ft S swell, 13-second period, light cross-off wind, just enough for a tiny clean wave. From Wednesday the 19th onward it’s mostly flat and windy, poor conditions straight through to Monday the 24th—an 8-day gap with nothing to recommend.
So the call is clear: dawn Sunday the 16th at In Betweens. That’s the day with real size, offshore wind, and solid energy. Everything else is a long wait. Stay frosty.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Mon morning, min 25°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Thu morning, min 25°C on Tue night). Mainly fresh winds. | ||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 187 | 254 | 276 | 286 | 226 | 228 | 238 | 219 | 269 | 276 | 509 | 498 | 890 | 734 | 653 | 537 | 496 | 405 | 498 |
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 |
High Tide | 00:59AM0.19m | 2:10PM0.78m | 2:02AM0.22m | 2:54PM0.80m | 2:55AM0.26m | 3:35PM0.79m | 3:43AM0.31m | 4:13PM0.75m | 4:30AM0.36m | 4:48PM0.69m | 5:17AM0.40m | 5:22PM0.62m | |||||||
Low Tide | 9:09PM0.12m | 6:20AM-0.01m | 9:40PM0.08m | 7:20AM-0.02m | 10:10PM0.06m | 8:15AM-0.02m | 10:40PM0.05m | 9:08AM-0.00m | 11:08PM0.04m | 9:58AM0.03m | 11:36PM0.04m | 10:49AM0.08m | 00:03AM0.04m | ||||||
 |  |  |  | | | | | | | | | | | | | | | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 7:06 | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 25 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 23 | 25 | 24 | 25 | 26 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 17 | SSW 12 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 |
| kJ | 99 | 186 | 86 | 223 | 184 | 176 | 186 | 165 | 269 | 243 | 509 | 498 | 890 | 734 | 653 | 537 | 496 | 405 | 302 |
Swell 2 Height (m) Direction Period (s) | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | W 12 | W 12 | W 12 | W 11 | W 12 | W 12 | W 11 |
| kJ | 150 | 96 | 102 | 56 | 56 | 42 | 23 | 40 | 16 | 276 | 218 | 218 | 25 | 11 | 11 | 10 | 11 | 11 | 21 |
Swell 3 Height (m) Direction Period (s) | NE 9 | SSE 10 | SSW 18 | SSE 10 | SSE 10 | SE 10 | SSE 9 | SSE 9 | S 21 | SSE 9 | W 13 | W 12 | SE 9 | SE 9 | SW 19 | SW 18 | SW 18 | SSW 18 | E 14 |
| kJ | 14 | 19 | 102 | 19 | 19 | 23 | 17 | 16 | 79 | 7 | 30 | 25 | 3 | 3 | 14 | 13 | 12 | 30 | 14 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 8 |
| kJ | 187 | 254 | 276 | 286 | 226 | 228 | 238 | 219 | 188 | 155 | 165 | 170 | 182 | 226 | 269 | 293 | 376 | 378 | 498 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 30 | 30 | 30 | 30 | 30 | 31 | 3 | 30 | 30 | 3 | 32 | 38 | 30 | 44 | 45 | 30 | 44 | 126 | 30 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the In Betweens Surf forecast
The above surf forecast table for In Betweens provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at In Betweens can be found by selecting the local surf guide option on the grey menu. Our In Betweens 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 (In Betweens) 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 In Betweens 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.
In Betweens is 4 km (2 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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