Nias, Mentawai, South Sumatra forecast by Craig Brokensha (issued Thu 6th Nov)

Best Days: Every day over the coming period

This Friday through next week (Nov 7 - 14)

A much needed pulse of S/SW groundswell is filling in today across Western Indonesia, offering fun sets across exposed breaks with generally light variable winds.

This swell should ease through tomorrow, but a stronger but slightly less consistent SW groundswell is still on track for Saturday.

This swell was generated over the weekend by a strong polar low firing up south-east of South Africa, aiming a fetch of gale to severe-gale SW winds towards us.

An inconsistent but strong 5-6ft+ swell is due across exposed beaches on Saturday across the Ments and South Sumatra ahead of a slow drop in size through Sunday and further into the middle of next week.

This easing trend should be slowed by a reinforcing S/SW groundswell arriving through Sunday from an intense mid-latitude low currently pushing from the Central Indian Ocean towards WA.

Our next considerable increase in swell is due later in the week, generated by a strong but not overly impressive polar front projecting from the south-east of South Africa, up into the Central Indian Ocean over the coming days.

This swell will only be moderate in size, arriving later Thursday and peaking Friday to 4-5ft at exposed spots in the Ments and 4-5ft+ around South Sumatra.

Winds for the most part should be light from the E/SE to SE across the entire region opening up plenty of options for a surf.

Longer term there's nothing to really get excited about so make the most of what's coming this period.

16 day Mentawai forecast graph
16 day Nias forecast graph
16 day South Sumatra forecast graph