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When To Go · Destination Guide

Hallaniyat Islands

Expedition diving and Arabian Sea megafauna off Dhofar's wild island frontier

Updated Feb 13, 2026 • 20 sources

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When to go

Best time to visit Hallaniyat Islands

Hallaniyat is highly seasonal for sea access.

Best overall window

Oct to Apr

More reliable crossings and calmer seas; water often around 24°C to 28°C.

Outside that window

Khareef monsoon brings rough seas and reduced visibility; offshore trips are frequently limited.

Choose your trip style

Start with the overall answer, then switch only when scuba, freedive, snorkel, or topside timing changes the trip in a meaningful way.

Month-by-month planner

The overall row stays visible so you can compare it against the currently selected scope.

BestGoodTradeoffsMore variable
ScopeJanFebMarAprMayJunJulAugSepOctNovDec
Overall
Wildlife goals and seasonal highlights

These do not replace the overall planner. Use them only if a specific animal or event is driving your trip dates.

  • Arabian Sea humpback whales (resident population)

    Best for Scuba, Freedive, Snorkel, Topside

    Year-round

    JanFebMarAprMayJunJulAugSepOctNovDec

    This endangered humpback whale subpopulation is unusual for being nonmigratory, with longterm research showing high site fidelity in Omani waters.

  • Reef manta ray aggregation window

    Best for Scuba, Freedive, Snorkel

    Oct to Jan

    JanFebMarAprMayJunJulAugSepOctNovDec

    Reef manta rays have documented seasonal aggregations around the Hallaniyat Islands area.

  • Khareef season landscapes in Dhofar

    Best for Topside

    Jun to Sep

    JanFebMarAprMayJunJulAugSepOctNovDec

    Dhofar's Khareef season brings mist and light rain that turn the mountains green and can create seasonal waterfalls at wadis such as Wadi Darbat.

  • Seabird breeding and sensitive nesting areas

    Best for Topside, Snorkel

    Apr to Sep

    JanFebMarAprMayJunJulAugSepOctNovDec

    The island group is recognized for important bird habitat.

  • Sea turtle nesting (variable, follow local guidance)

    Best for Topside, Snorkel

    May to Aug

    JanFebMarAprMayJunJulAugSepOctNovDec

    The islands include turtle nesting beaches.

Always true for this destination
  • Salalah gets much busier during Khareef (June to September), even though offshore access can be harder.
Seasonal cautions
  • May, Sep: Hotter air, variable sea state; plan flexible itineraries and choose lee-side sites.
  • Jun to Aug: Khareef monsoon brings rough seas and reduced visibility; offshore trips are frequently limited.

Built from climate references, access rules, and destination operators. Wildlife timing and route flexibility can shift year to year.