Surf Forecasts:
Inside Reef (Hikkaduwa) surf forecast from 11 Aug 2026:
- Most powerful swell: Tuesday 18 Aug, 11AM (local time) - 7ft (2.2m), 19s period, SSW swell with 3,612 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 11AM. 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 | 11AM (Tue 18th Aug) | 7ft (2.2m) 19s |
Table - best surf conditions forecast for Inside Reef (Hikkaduwa) over the next 16 days.
The Lowdown
Hey, Rusty here again, breakin’ down the Hikkaduwa surf over the next couple weeks for Inside Reef. It’s a bit of a grind, to be honest.
Starting off Tuesday the 11th, there’s a 4 ft south groundswell with a long 18-second period, pumping a good amount of energy (1604). But the wind’s onshore with thunderstorms around, so it’s not clean. Water temp is 82°, dead average for August.
From Wednesday the 12th all the way into the start of the second week, it’s mostly poor. The wind stays from the west and west-northwest at around 12 mph, mostly cross-onshore, making things choppy. Swell runs from 3 ft up to 5 ft, but often with short, weak periods (7 to 11 seconds). The energy is moderate (453 to 947). Not a good run.
The first real shift happens Monday the 17th afternoon. The wave energy jumps to 1534 and the swell comes from the SSW at 3 ft with a 21-second period. The wind is still cross-onshore, but the energy is there.
The big standout is Tuesday the 18th. We get a 7 ft SSW groundswell with a 19-second period and the combined energy blasts up to 4078. That’s strong wave energy for this reef. The wind is still cross-onshore at 12 mph, so it won’t be perfect glass, but the size and power are legit. This is for experts only—too big for beginners at over 5 ft. Crowds can show up sometimes. Wednesday the 19th also holds at 7 ft with similar long-period energy.
After that, through the rest of the month, size drops under 7 ft, the wind stays cross-onshore from the west, and the energy gradually fades. Nothing else stands out.
So the call is simple: if you’re paddling out, aim for Tuesday the 18th and Wednesday the 19th on Inside Reef. That’s your best shot at something meaningful.
Rusty.
Short Range ForecastHeavy rain (total 61mm), heaviest during Wed night. Warm (max 27°C on Tue afternoon, min 26°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Fri night. Warm (max 28°C on Sat morning, min 26°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | S 18 | S 18 | S 12 | S 16 | S 11 | S 11 | SSE 11 | W 8 | SW 16 | SSE 11 | S 11 | WNW 7 | WNW 7 | W 9 | W 9 | W 10 | W 10 | SW 22 | SSW 21 | SSW 21 |
Wave Graph  | ||||||||||||||||||||
 kJ | 777 | 871 | 224 | 516 | 332 | 345 | 286 | 228 | 263 | 259 | 403 | 261 | 163 | 327 | 347 | 369 | 362 | 231 | 871 | 2731 |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:03AM0.49m | 2:09PM0.65m | 2:36AM0.57m | 2:39PM0.67m | 3:07AM0.62m | 3:07PM0.68m | 3:38AM0.66m | 3:34PM0.67m | 4:08AM0.66m | 4:00PM0.64m | 4:36AM0.65m | 4:24PM0.59m | 5:04AM0.61m | |||||||
Low Tide | 8:12PM0.09m | 7:53AM0.10m | 8:36PM0.05m | 8:29AM0.09m | 9:00PM0.02m | 9:03AM0.08m | 9:24PM0.00m | 9:33AM0.09m | 9:48PM-0.00m | 10:02AM0.11m | 10:11PM0.01m | 10:29AM0.14m | 10:33PM0.03m | |||||||
 |  | |  | | | |  | | | | |  |  | | | | | | | |
 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 6:24 | — | — | 6:23 | — | — | 6:23 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — |
mm | 5 | 12 | 4 | 6 | 15 | 5 | 2 | 8 | 4 | 2 | 5 | 1 | — | — | 1 | — | 5 | 3 | 1 | 5 |
Temp °C | 27 | 27 | 27 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 27 |
Feels °C | 28 | 30 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 30 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 11 | S 18 | SSE 10 | W 8 | S 11 | W 8 | SSE 11 | SSE 10 | SSE 11 | SSE 11 | S 11 | SW 7 | SSE 10 | SSE 11 | W 9 | SSE 11 | W 10 | SSE 10 | SSW 21 | SSW 21 |
| kJ | 303 | 871 | 218 | 124 | 332 | 235 | 286 | 218 | 263 | 259 | 403 | 102 | 111 | 245 | 347 | 254 | 362 | 184 | 871 | 2731 |
Swell 2 Height (m) Direction Period (s) | S 18 | SSE 11 | WNW 9 | S 16 | SSW 15 | S 11 | SSW 15 | SW 14 | SW 16 | SSW 16 | SSW 15 | SSE 10 | SW 6 | SW 14 | SSE 11 | SW 14 | SSE 11 | SW 22 | SSE 10 | SSE 10 |
| kJ | 777 | 214 | 138 | 516 | 191 | 345 | 146 | 47 | 261 | 171 | 148 | 236 | 40 | 100 | 249 | 99 | 198 | 231 | 184 | 143 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | S 11 | S 12 | SSE 11 | S 14 | SSW 15 | S 19 | S 21 | S 19 | S 19 | S 18 | SSW 15 | S 12 | S 26 | SW 14 | SW 24 | SW 13 | SW 13 | SSW 16 | SSW 14 |
| kJ | 205 | 157 | 224 | 176 | 100 | 142 | 64 | 133 | 188 | 176 | 156 | 146 | 139 | 13 | 100 | 22 | 87 | 44 | 100 | 140 |
Wind waves Height (m) Direction Period (s) | W 10 | W 6 | W 7 | WSW 6 | W 8 | — | W 8 | W 8 | W 6 | W 6 | W 6 | WNW 7 | WNW 7 | W 9 | W 6 | W 10 | — | W 6 | W 10 | W 10 |
| kJ | 319 | 156 | 152 | 131 | 241 | — | 234 | 228 | 194 | 206 | 184 | 261 | 163 | 327 | 79 | 369 | — | 125 | 379 | 347 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 333 | 58 | 646 | 338 | 767 | 211 | 859 | 211 | 205 | 210 | 211 | 205 | 205 | 40 | 210 | 24 | 24 | 210 | 210 | 210 |
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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