Surf Forecasts:
In Betweens surf forecast from 20 Aug 2026:
- Best quality surf: Saturday 22 Aug, 5AM (local time) - 2.5ft (0.8m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 8AM (local time) - 2.5ft (0.8m), 17s period, S swell with 358 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8AM (local time) - 2ft (0.6m), 18s period with SSW swell.
Best Forecast Surf Conditions for In Betweens this week:
The surf forecast for In Betweens over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 8AM. The primary swell is predicted to be 0.6m and 18s period with a secondary swell of 0.8m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at In Betweens in the next 16 days are 0.8m 17s and forecast to arrive on Thursday (Aug 27) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 7s period and expected on Thursday (Aug 20) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 20th Aug) | 2ft (0.6m) 18s |
| Best Surf | 5AM (Sat 22nd Aug) | 2.5ft (0.8m) 16s |
| Most Powerful | 8AM (Thu 27th Aug) | 2.5ft (0.8m) 17s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, let’s get into it. Right now, things are pretty quiet at In-Betweens. This is a reef break, good for beginners, and it’s fairly consistent – but we’ve got a long stretch ahead where the wind just won’t let up. The water’s sitting at 80°, pretty normal for this time of year.
The first few days offer small, clean waves but nothing special. Thursday the 20th has waist-high SSW swell around 2 ft with a very long 18-second period, light cross-off wind, and the combined energy is weak (261). It’s clean but tiny. Friday the 21st is similar, with a little more size at 2 ft and light breezes, but still nothing to write home about. Saturday the 22nd sees the wind absolutely howling from the ENE at 22–25 mph, and while the waves stay small, the fresh breeze kills the quality. From Sunday the 23rd right through to the end of August, the story is the same: strong ENE wind, messy conditions, and even though there’s a bump in swell toward the end of the month, the wind stays too strong for clean surf.
Now, the end of the forecast is where it gets interesting. From Sunday the 30th onward, the swell starts to build. Sunday the 30th afternoon has 7 ft ENE swell with a 14-second period and combined energy hitting 1704 – that’s strong energy. The wind is still fresh from the ENE, though, so expect bumpy conditions. Monday the 31st morning sees 7 ft ENE swell, 13-second period, and the energy is even higher at 1841. This is solid, groundswell-driven surf, but it’s only for the experienced crew – 7 ft on a reef with cross-off wind is no joke. Tuesday the 1st of September keeps the size around 8 ft, period dropping to 12 seconds, still strong energy. If you’re an expert and you can handle the wind, these days could offer some punchy, powerful waves. But the wind is still fresh, so it’s not going to be glassy perfection.
The standout here is the stretch from the 30th of August through to the 1st of September. It’s the biggest swell we’ve seen in the forecast, with strong energy (over 1700), but the wind never really goes light. For a beginner reef break, these days are too big and too windy. For the strong paddler, it’s a potential go, but don’t expect it to be smooth.
After that, Wednesday the 2nd of September drops off hard – tiny swell, weak energy, and the run ends with poor conditions through to the 4th.
If you’re a kite surfer, the whole period from the 23rd of August onward with 22–25 mph cross-off wind and decent swell might actually be more your style than a paddle surfer’s.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 25°C on Thu morning). Winds increasing (light winds from the ENE on Thu night, strong winds from the ENE by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sun morning, min 25°C on Sun morning). Mainly strong winds. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | SSW 18 | SSW 17 | SW 16 | SW 17 | SW 16 | SSW 16 | SW 16 | ENE 7 | E 7 | ENE 7 | ENE 6 | ENE 7 | SSW 14 | SSW 13 | E 7 | ENE 8 | ENE 7 | ENE 7 | S 18 | S 18 | S 18 |
Wave Graph | |||||||||||||||||||||
207 | 200 | 274 | 291 | 264 | 322 | 261 | 255 | 311 | 327 | 261 | 240 | 195 | 156 | 233 | 316 | 284 | 204 | 165 | 304 | 161 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | 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 | 11:25AM0.56m | 10:11PM0.21m | 12:25PM0.59m | 00:08AM0.21m | 1:12PM0.63m | 1:06AM0.23m | 1:52PM0.66m | 1:46AM0.26m | 2:26PM0.67m | 2:21AM0.29m | 2:56PM0.68m | 2:55AM0.33m | 3:24PM0.68m | 3:31AM0.37m | |||||||
Low Tide | 8:27PM0.20m | 8:41PM0.17m | 5:06AM0.12m | 9:00PM0.16m | 6:08AM0.10m | 9:18PM0.14m | 6:59AM0.08m | 9:35PM0.13m | 7:43AM0.06m | 9:53PM0.11m | 8:24AM0.05m | 10:12PM0.10m | |||||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | |
— | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 29 | 29 | 29 | 31 | 30 | 29 | 27 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 24 | 25 | 25 | 24 | 23 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | E 8 | ENE 7 | ENE 7 | SW 17 | ENE 7 | SSW 16 | ENE 7 | SW 16 | SSW 16 | SW 15 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | SSW 13 |
54 | 131 | 111 | 291 | 81 | 322 | 135 | 255 | 212 | 115 | 191 | 100 | 166 | 156 | 93 | 86 | 142 | 121 | 163 | 304 | 137 | |
Swell 2 Height (m) Direction Period (s) | NE 6 | SSW 17 | SW 16 | ENE 7 | SW 16 | W 10 | SW 16 | W 12 | S 14 | S 13 | SSE 13 | SSE 13 | SSE 12 | E 8 | SSW 17 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | S 18 |
42 | 200 | 274 | 51 | 264 | 31 | 261 | 69 | 104 | 90 | 35 | 56 | 58 | 51 | 94 | 146 | 56 | 56 | 165 | 98 | 161 | |
Swell 3 Height (m) Direction Period (s) | SSW 18 | W 11 | W 9 | NNE 7 | W 10 | S 13 | WNW 10 | S 12 | WNW 10 | SSW 15 | WNW 10 | ESE 9 | SSW 18 | SSE 12 | SSE 12 | SSE 12 | SSE 11 | SSW 18 | SSE 6 | SSE 8 | SSW 16 |
207 | 37 | 27 | 30 | 49 | 54 | 34 | 47 | 62 | 76 | 21 | 29 | 62 | 56 | 45 | 28 | 23 | 109 | 4 | 7 | 86 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 7 | — | ENE 7 | E 7 | ENE 7 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | E 7 | ENE 8 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 |
— | — | — | — | — | 83 | — | 219 | 311 | 327 | 261 | 240 | 195 | 132 | 233 | 316 | 284 | 204 | 139 | 117 | 144 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 1 | 0 | 0 | 30 | 41 | 38 | 45 | 47 | 30 | 38 | 38 | 30 | 38 | 38 | 30 | 30 | 1 | 1 |
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.











