Surf Forecasts:
Mandiri surf forecast from 18 Jun 2026:
- Best quality surf: Saturday 20 Jun, 4PM (local time) - 4.5ft (1.4m), 16s period, SW swell with glassy winds.
- Most powerful swell: Monday 22 Jun, 7PM (local time) - 5ft (1.6m), 16s period, SW swell with 1,239 kJ wave energy.
- Next surfable swell (1★+): Thursday 18 Jun, 10PM (local time) - 4.5ft (1.3m), 12s period with S swell.
Best Forecast Surf Conditions for Mandiri this week:
The surf forecast for Mandiri over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jun 18) at 10PM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.6m and 13s. Another secondary swell of 1.2m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mandiri in the next 16 days are 1.6m 16s and forecast to arrive on Monday (Jun 22) at 7PM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 18th Jun) | 4.5ft (1.3m) 12s |
| Best Surf | 4PM (Sat 20th Jun) | 4.5ft (1.4m) 16s |
| Most Powerful | 7PM (Mon 22nd Jun) | 5ft (1.6m) 16s |
Table - best surf conditions forecast for Mandiri over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Fri night. Warm (max 30°C on Thu morning, min 25°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Tue afternoon. Warm (max 29°C on Mon morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
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 13 | S 12 | SSE 10 | S 9 | SW 18 | SSW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SSW 15 | SW 15 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 361 | 501 | 363 | 256 | 327 | 487 | 757 | 883 | 868 | 844 | 844 | 890 | 681 | 893 | 1060 | 881 | 784 | 711 | 623 | 476 | 476 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | cross-on | cross-on | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | glassy | on | glassy | glassy | glassy | off | glassy | cross-on | glassy |
High Tide | 9:42PM0.78m | 9:36AM1.22m | 10:33PM0.83m | 10:24AM1.11m | 11:25PM0.88m | 11:12AM0.97m | 00:19AM0.91m | 12:03PM0.84m | 1:14AM0.94m | 1:00PM0.72m | 2:09AM0.96m | 2:08PM0.62m | 3:03AM0.98m | ||||||||
Low Tide | 3:44PM-0.00m | 3:02AM0.22m | 4:26PM0.05m | 4:00AM0.28m | 5:07PM0.11m | 5:04AM0.35m | 5:46PM0.17m | 6:16AM0.40m | 6:23PM0.23m | 7:40AM0.43m | 7:02PM0.28m | 9:11AM0.41m | 7:43PM0.33m | ||||||||
 | |  | | |  |  |  |  | | | | | | | | | |  | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | 1 | — | 1 | 3 | — | 1 | 4 | — | 1 | 1 | — | 5 | 2 | 1 | 6 | 5 |
Temp °C | 30 | 29 | 26 | 29 | 29 | 26 | 29 | 28 | 26 | 28 | 28 | 26 | 29 | 28 | 25 | 28 | 27 | 25 | 28 | 27 | 25 |
Feels °C | 32 | 32 | 30 | 32 | 32 | 30 | 33 | 33 | 30 | 31 | 32 | 30 | 32 | 31 | 29 | 32 | 32 | 29 | 31 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | S 12 | S 10 | S 9 | S 9 | S 9 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 15 | SSW 15 | SW 15 | SW 14 | SW 14 |
| kJ | 361 | 501 | 226 | 256 | 203 | 212 | 757 | 883 | 868 | 844 | 844 | 890 | 681 | 893 | 1060 | 881 | 784 | 711 | 623 | 476 | 476 |
Swell 2 Height (m) Direction Period (s) | S 9 | SW 13 | SW 13 | SSW 12 | SW 18 | SSW 17 | S 9 | S 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SSW 18 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 6 | S 6 | SSE 7 | SSE 8 |
| kJ | 133 | 85 | 132 | 101 | 327 | 487 | 217 | 173 | 146 | 116 | 84 | 54 | 390 | 55 | 50 | 49 | 36 | 29 | 17 | 42 | 58 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | WNW 8 | S 12 | SSW 20 | SSW 12 | SW 12 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | SSE 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | SSE 8 | WNW 12 | WNW 10 |
| kJ | 120 | 7 | 104 | 151 | 98 | 72 | 7 | 13 | 12 | 12 | 12 | 12 | 55 | 13 | 12 | 12 | 6 | 6 | 7 | 27 | 21 |
Wind waves Height (m) Direction Period (s) | — | SSE 9 | SSE 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 199 | 363 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 56 | 0 | 56 | 35 | 0 | 6 | 0 | 0 | 13 | 0 | 0 | 0 | 35 | 0 | 0 | 0 | 0 | 0 | 56 | 0 |
Best forecast wave conditions in Indonesia - Sumatra - Mainland | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mandiri surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Mandiri Surf forecast
The above surf forecast table for Mandiri provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mandiri can be found by selecting the local surf guide option on the grey menu. Our Mandiri 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 (Mandiri) 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 Mandiri 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.
Mandiri is 113 km (70 miles) from the city of Kotabumi. If you plan a holiday in Indonesia - Sumatra - Mainland, look for hotels and other accommodation in Kotabumi. Kotabumi has rooms for a wide range of budgets as well as car hire and transport links.
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