Surf Forecasts:
Inside Reef (Hikkaduwa) surf forecast from 16 Aug 2026:
- Most powerful swell: Tuesday 18 Aug, 8AM (local time) - 7ft (2.2m), 19s period, SSW swell with 3,650 kJ wave energy.
Best Forecast Surf Conditions for Inside Reef (Hikkaduwa) this week:
The most powerful waves expected at Inside Reef (Hikkaduwa) in the next 16 days are 2.2m 19s and forecast to arrive on Tuesday (Aug 18) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (+0530) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Tue 18th Aug) | 7ft (2.2m) 19s |
Table - best surf conditions forecast for Inside Reef (Hikkaduwa) over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at the next few weeks for Inside Reef (Hikkaduwa). I gotta be straight with you—this is a tough stretch. The water’s sitting at a warm 82°, which is pretty much bang on average for this time of year, so no surprises there.
The pattern for the next 16 days is dominated by a persistent onshore to cross-onshore wind, mostly from the west and southwest, making conditions generally messy and choppy. We’re looking at a long stretch of marginal to poor surf, with only a few windows that might be worth a look. The combined swell energy is moderate, often in the hundreds, but it does spike into the thousands (1000-4000) during the middle of the period, which is a sign of stronger energy.
For the first few days, it’s a write-off. Sunday the 16th and Monday the 17th have us with risk of thunderstorms and onshore wind, and the surf is poor. Tuesday the 18th and Wednesday the 19th see a jump in swell size, with waves around 7ft and 7ft from the SSW, but the strong cross-onshore wind (20-25 km/h, that's about 12-16 mph) keeps the quality marginal at best. The combined energy is strong (3472-4090), but it’s just too messy. For a spot like Inside Reef, with that ideal SW swell direction, it’s frustrating to see the wind so wrong.
The best of a bad bunch looks to be Tuesday the 30th and Wednesday the 31st. On Tuesday the 30th, we have SSW swell at 6ft with a period of 15 seconds, and combined energy of 2625. The wind is still onshore, but the longer period gives the waves a bit more shape. The 31st of August is interesting too, with a 8ft SSW swell (19 seconds period) and combined energy of 4961 on Monday morning. That’s a solid, powerful groundswell, but it’s big—only for the experts. The cross-onshore wind will make it a battle, but the long period might mean a few clean sets at a reef like this. The afternoon on the 31st drops to 6ft and is still marginal, but it’s the most promising to check.
The rest of the time is a lot of poor or marginal surf with that same west wind. There are days with no recommendation at all. Honestly, this setup looks more interesting for kite surfing than paddle surfing for most of it, given the strong, consistent cross-onshore wind and choppy conditions.
Rusty, signing off.
Short Range ForecastHeavy rain (total 33mm), heaviest during Mon afternoon. Warm (max 28°C on Sun afternoon, min 26°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 36mm), heaviest during Thu night. Warm (max 28°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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) | W 10 | W 10 | SSW 22 | SSW 22 | SSW 21 | SSW 19 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | S 14 | S 17 | S 15 | S 15 | SSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 414 | 371 | 415 | 896 | 2757 | 3650 | 3463 | 3393 | 2408 | 1896 | 2980 | 2365 | 2054 | 1310 | 1121 | 938 | 819 | 1275 | 1466 | 684 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on |
High Tide | 4:00PM0.64m | 4:36AM0.65m | 4:24PM0.59m | 5:04AM0.61m | 4:47PM0.53m | 5:31AM0.56m | 5:05PM0.47m | 6:00AM0.50m | 5:13PM0.40m | 6:37AM0.43m | 4:43PM0.34m | 8:50AM0.38m | ||||||||
Low Tide | 10:11PM0.01m | 10:29AM0.14m | 10:33PM0.03m | 10:56AM0.16m | 10:55PM0.06m | 11:23AM0.20m | 11:16PM0.10m | 11:52AM0.24m | 11:35PM0.15m | 12:31PM0.29m | 11:48PM0.20m | 8:59PM0.24m | ||||||||
 |  | | | | |  | | | | | | | | | | | | | | |
 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:21 | — |
mm | 2 | 1 | 3 | 7 | 14 | 4 | — | 2 | — | 2 | 3 | 1 | — | 8 | 5 | 5 | 9 | 3 | 3 | 2 |
Temp °C | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 26 | 27 | 27 | 27 |
Feels °C | 29 | 29 | 28 | 28 | 29 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 28 | 29 | 28 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 11 | SSE 11 | SSE 10 | SSW 22 | SSW 21 | SSW 19 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | S 14 | S 13 | S 15 | S 15 | SSW 14 |
| kJ | 249 | 240 | 152 | 896 | 2757 | 3650 | 3463 | 3393 | 2408 | 1896 | 2980 | 2365 | 2054 | 1310 | 1121 | 938 | 564 | 1275 | 1466 | 684 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 13 | SSW 22 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | S 19 | S 18 | WNW 11 | W 10 | W 10 | W 10 | W 10 | S 19 | S 17 | S 18 | S 26 | S 10 |
| kJ | 99 | 87 | 415 | 146 | 111 | 85 | 52 | 49 | 913 | 1455 | 24 | 46 | 46 | 78 | 71 | 254 | 819 | 224 | 13 | 156 |
Swell 3 Height (m) Direction Period (s) | S 7 | SW 24 | SW 13 | SW 13 | SSW 14 | SW 12 | — | S 21 | W 9 | — | — | — | — | S 24 | S 22 | W 10 | W 9 | S 18 | S 26 | WNW 8 |
| kJ | 8 | 87 | 44 | 85 | 140 | 37 | — | 323 | 76 | — | — | — | — | 11 | 36 | 47 | 40 | 307 | 13 | 24 |
Wind waves Height (m) Direction Period (s) | W 10 | W 10 | WSW 9 | W 10 | W 6 | W 6 | W 7 | W 9 | W 6 | W 6 | W 6 | W 7 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 |
| kJ | 414 | 371 | 355 | 361 | 156 | 190 | 198 | 274 | 113 | 158 | 165 | 219 | 175 | 148 | 153 | 124 | 141 | 123 | 92 | 91 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 859 | 211 | 210 | 859 | 211 | 205 | 210 | 211 | 205 | 210 | 210 | 205 | 210 | 211 | 210 | 338 | 211 | 210 | 859 | 338 |
Best forecast wave conditions in West Sri Lanka | ||||||||||||||||||||
Best forecast wave conditions in Sri Lanka | ||||||||||||||||||||
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Information about the Inside Reef (Hikkaduwa) Surf forecast
The above surf forecast table for Inside Reef (Hikkaduwa) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Inside Reef (Hikkaduwa) can be found by selecting the local surf guide option on the grey menu. Our Inside Reef (Hikkaduwa) 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 (Inside Reef (Hikkaduwa)) 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 Inside Reef (Hikkaduwa) 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.
Inside Reef (Hikkaduwa) is 9 km (6 miles) from the city of Ambalangoda. If you plan a holiday in West Sri Lanka, look for hotels and other accommodation in Ambalangoda. Ambalangoda has rooms for a wide range of budgets as well as car hire and transport links.
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