Zanzibar · Month comparison

September vs June

June ranks #1 overall vs September at #3. The dry season opens — whale sharks arrive, ZIFF kicks off, and Zanzibar is at its most rewarding.

Zanzibar September — aerial view of a coastal resort with turquoise water in the dry season

September

#3 of 12 months

Best match

Excellent conditions as the crowds thin — the last month of whale shark season.

  • ↑Whale shark season closes in September — a final month of high-reliability encounters before the season ends; if seeing whale sharks is the goal, September is the last viable window
  • ↑European school holidays have ended and international crowds drop significantly — beaches are less crowded than August, and Stone Town's restaurants and attractions are accessible without the peak-season intensity
Zanzibar June — a man on a traditional sailing dhow off the Matemwe coastline as dry season begins

June

#1 of 12 months

Best match

The dry season opens — whale sharks arrive, ZIFF kicks off, and Zanzibar is at its most rewarding.

  • ↑Whale shark season begins (June–September) — snorkelling with whale sharks off the south coast near Diani is one of East Africa's most extraordinary wildlife encounters, and Zanzibar is one of the most reliable locations in the world for it
  • ↑Zanzibar International Film Festival (ZIFF) runs in late June to early July — Stone Town's Old Fort hosts outdoor screenings, concerts, and cultural events in what is the island's most important annual event after Sauti za Busara
FactorSeptemberJune
Weather score
8
8
Value score
6
7
Crowd score
7
7
Events score
5
8
Atmosphere
7
7
Avg high temp27°C27°C
Monthly rain35mm42mm
Daily sunshine8hrs7.8hrs

September trade-offs

  • ↓Rainfall starts to return as the short rains approach — September can see the first showers of the transition period, though 35mm across the month is still genuinely dry by any reasonable measure
  • ↓The trade winds begin easing which improves snorkelling conditions but can reduce kite surfing reliability; the kite season's best window is June–August rather than September
  • ↓The kaskazi (north-east monsoon) is approaching — sea conditions can become more variable toward the end of September as the seasonal transition begins

June trade-offs

  • ↓It's the coolest month of the year by Zanzibar standards at 27°C — still warm, but the evenings can feel genuinely cool for those acclimatised to tropical heat; bring a light layer for Stone Town evenings
  • ↓The south-east trade winds (kaskazi) blow through June with some strength — excellent for kite surfers but creating choppier conditions for snorkelling on exposed reefs
  • ↓ZIFF brings a spike in Stone Town accommodation demand in its specific week — book ahead for the festival period
See all 12 months for Zanzibar →September in detail →June in detail →
Scores compare months within Zanzibar. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →