What size does Five-O work best at?

3–10 ft is the working range. Below that it goes flat; above, it stops being fun and the lineup thins out.

When is the best season to surf Five-O?

Peak season runs through the months when the swell window aligns and trade winds blow offshore. See the month strip in Wave fit for the working window.

What swell direction does Five-O need?

Five-O works on a s - w groundswell with north easterly winds.

What are the main hazards?

no concerns. Reef booties are common at reef breaks; check tide and crowd conditions before paddling out.

What type of wave is Five-O?

Five-O is a left breaking wave over reef. Heavy hollow reef barrel, tide-dependent.

Kabupaten Sumba Timur, East Nusa Tenggara, Indonesia

Five-O

-10.259, 120.591

Edited by Thomas Jackson

Verified May 2026

Cross-referencedCross-checked against 1 reference

Left · ReefAdvanced3–10 ftMay – Sep

Five-O detonates over a submerged reef bend on the south coast of Sumba, East Nusa Tenggara, throwing heavy lips and proper shacks for surfers willing to gamble on the right conditions. It needs S to W swell in the 3-10ft range, NE offshore winds, and critically, high tide only, at lower water the reef becomes an unworkable hazard. Consistency is low, so expect to combine a visit here with nearby Sumba alternatives rather than basing an entire trip around it. Skilled surfers who time it correctly get barreling sections over the submerged reef with 100-200m of potential ride length when everything clicks. Bottom: submerged reef. Season: austral winter south swells, May through September. Consistency: low. Pack a step-up and check the tide chart before paddling out, a missed high-tide window means sitting on dry reef waiting hours for another shot.

Wave fit

Skill suited

Advanced

BegIntAdv

Best months

May – Sep

Character

Heavy hollow reef barrel, tide-dependent.

Conditions

When it works

Swell window

S - W

Offshore wind

North easterly

Optimum tide

High tide only

Size range

3-10ft

Low

Hazards

No concerns

Trip planning

Quick facts

Wetsuit

Boardies

What to bring

Step-up 6ft 4in to 7ft for solid swell days
Shortboard 6ft to 6ft 2in on the smaller end of the range

Lineup

Mellow lineup

Where it sits

Location

Loading map...

About this break

What it's actually like

Crowd Access Nearby Alternatives

Crowd & Localism

Rarely crowded, partly by design, low consistency and a demanding skill threshold keep the lineup thin. Expert-only conditions do the filtering naturally. Respect the remote setting and the reef.

Access & Facilities

No parking facilities and no amenities on-site. Sumba's surf zones require forward planning: bring water, food, and first aid. The nearest access hub is Waingapu, roughly a long drive away. This is a self-sufficient operation.

Nearby Alternatives

When Five-O isn't firing, Miller's Rights at Tarimbang (about 3 hours from Waingapu) are Sumba's most consistently ridden wave. Pero Lefts offer heavy bowl sections with genuine tube time, and Wainukaka rivermouth mixes fast, hollow, and fat sections in a single ride.

10-day swell, wind and tide