Climate guide for Symi, Greece

Best Time to Visit
Symi

How to read the score (0–10)
05810
UnfavorableGoodOptimal
01 · Greece

About Symi

Symi's harbour is ringed by tiers of ochre houses and churches, with the monastery of Panormitis and quiet coves reachable by boat or taxi boat. The island was once a sponge-diving centre, and its mansions and maritime museum reflect that wealth. May, June and September stretch the swimming season; July and August are busiest, and the island's boats link to Rhodes and the Turkish coast.

02

Did you know?

03

Travel Tips

01Best time to visit Symi
Check seasonal weather curves and book accommodations early for Symi.
02Best time & timing
June leads the year at 10.0/10, with July and August close behind — January (1.4/10) is the one to avoid without a specific reason.
03Weather & what to pack
In June plan for about 26°C; the month brings 13 mm of rain. Pack the lightest clothing you own, a hat and more water than feels necessary.

Things to do in Symi

Symi, Greece. Live activities and tours from GetYourGuide, matched to this destination.

When to visit Symi: the short answer

Plan Symi for June, with July, August close behind — the stretch with the most usable temperatures and the fewest lost days to rain: June averages 26°C with 13 mm of rain and about 30 days with 6+ hours of sunshine. The months to avoid unless you have a specific reason are January, December.

Across the year Symi swings from 14°C in February to 30°C in July, a 16-degree spread, while rainfall ranges from 2 mm in July to 202 mm in December. In short, Symi is not equally good year-round — the gap between its best and worst month is 8.6 points on the same 10-point scale.

Warmest month: July (30°C). Coolest: February (14°C). Driest: July (2 mm). Wettest: December (202 mm).

Symi month by month

January in Symi — off-season conditions

Hardest · 1.4/10

Temperatures hover around 14°C (58°F) — the kind of month where neither heat nor cold forces the schedule.

171 mm of rain signals a properly wet month, with only about 2 days with 6+ hours of sunshine to count on — build indoor options into the schedule.

That is 1.4/10 on the same scale — 12th of 12 months, versus 10/10 for the best month here.

Expect low-season pricing, and crowds are light for this destination.

Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.

If your dates are flexible, June is materially better in Symi — 8.6 points higher on the same scale.

February in Symi: expect compromises

Hardest · 3.7/10

Temperatures hover around 14°C (57°F) — the kind of month where neither heat nor cold forces the schedule.

Budget for roughly 69 mm of rain this month — a flexible day or two helps — with about 9 days with 6+ hours of sunshine and 10.6 hours of daylight to work around it.

That is 3.7/10 on the same scale — 10th of 12 months, versus 10/10 for the best month here.

Budget for low-season pricing, and crowds are light for this destination.

Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.

If your dates are flexible, June is materially better in Symi — 6.3 points higher on the same scale.

March in Symi — workable with trade-offs

Trade-offs · 5/10

March averages 15°C (58°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

Rainfall runs 78 mm, so plan one flexible day in three; you still get about 19 days with 6+ hours of sunshine and 11.7 hours of daylight.

It scores 5/10 here, 8th of 12 months, against 10/10 in the destination's best month.

Figure on mid-season pricing, with crowds are moderate.

Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.

Flexible dates? June scores 5 points higher here — enough to change the trip.

April in Symi: strong conditions, 7th of 12

Good · 7.6/10

Temperatures hover around 18°C (64°F) — the kind of month where neither heat nor cold forces the schedule.

With around 22 mm of rain, any showers tend to pass through rather than settle in; about 28 days with 6+ hours of sunshine and 12.9 hours of daylight fill the rest.

That is 7.6/10 on the same scale — 7th of 12 months, versus 10/10 for the best month here.

Budget for mid-season pricing, and crowds are moderate.

Pack layers you can shed by midday plus one warm layer for the evening.

If your dates are flexible, June is materially better in Symi — 2.4 points higher on the same scale.

May ranks 6th of 12 for Symi — one of the best windows

Best window · 9/10

May averages 21°C (70°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Expect 22 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 14 daylight hours.

A 9/10 puts this among the year's best months in Symi (6th of 12); only June scores higher, at 10/10.

Plan for mid-season pricing, with crowds are moderate.

Pack light clothing, swimwear and real sun protection.

June in Symi — the year's strongest window

Best window · 10/10

Days in June average 26°C (79°F) — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.

At just 13 mm for the month, rain will not shape your plans; you get about 30 days with 6+ hours of sunshine and 14.5 hours of daylight.

On our climate-comfort scale this is the top-ranked month of the year for Symi at 10/10 — the reference point every other month on this page is measured against.

Expect peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

July is one of the strongest months in Symi (2nd)

Best window · 10/10

Days in July average 30°C (85°F) — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.

At just 2 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 14.3 hours of daylight.

On our climate-comfort scale this is one of the strongest months of the year for Symi at 10/10 (2nd of 12), just behind June at 10/10.

Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

August is one of the strongest months in Symi (3rd)

Best window · 10/10

August averages 29°C (84°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.

Rain is a non-issue at 14 mm for the month, with about 31 days with 6+ hours of sunshine and 13.4 hours of daylight to work with.

A 10/10 puts this among the year's best months in Symi (3rd of 12); only June scores higher, at 10/10.

Figure on peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

September ranks 4th of 12 for Symi — one of the best windows

Best window · 10/10

September averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.

Expect 19 mm of rain — occasional showers rather than washed-out days — alongside about 26 days with 6+ hours of sunshine and 12.2 daylight hours.

A 10/10 puts this among the year's best months in Symi (4th of 12); only June scores higher, at 10/10.

Figure on peak pricing, with crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

October in Symi — one of the year's strongest windows (5th)

Best window · 9.2/10

With 24°C (75°F) on average, October delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.

At just 13 mm for the month, rain will not shape your plans; you get about 17 days with 6+ hours of sunshine and 11 hours of daylight.

On our climate-comfort scale this is one of the strongest months of the year for Symi at 9.2/10 (5th of 12), just behind June at 10/10.

Budget for mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection.

November in Symi — the hardest end of the year

Hardest · 4.2/10

With 20°C (68°F) on average, November delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.

140 mm of rain signals a properly wet month, with only about 5 days with 6+ hours of sunshine to count on — build indoor options into the schedule.

That is 4.2/10 on the same scale — 9th of 12 months, versus 10/10 for the best month here.

Budget for low-season pricing, and crowds are light for this destination.

Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.

If your dates are flexible, June is materially better in Symi — 5.8 points higher on the same scale.

December in Symi — the hardest end of the year

Hardest · 1.8/10

December averages 17°C (63°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

202 mm of rain puts this in monsoon territory — almost no days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.

It scores 1.8/10 here, 11th of 12 months, against 10/10 in the destination's best month.

Plan for low-season pricing, with crowds are light for this destination.

Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.

Flexible dates? June scores 8.2 points higher here — enough to change the trip.

FAQ

Frequently asked

When is the best time to visit Symi, Greece?
In Ideal Weather mode, the best months to visit Symi are June, July, August, September, October, May. June is the single peak month with an Ideal Weather score of 10.0/10 based on temperature, rainfall, humidity, daylight and days with 6+ hours of sunshine.
What is the weather like in Symi year-round?
Symi has a climate profile suited to beach and coastal travel. Average monthly temperatures range from 14°C in February to 30°C in July, with Ideal Weather scores between 1.4 and 10.0 out of 10.
Which months should I avoid in Symi?
The lowest Ideal Weather-scoring months in Symi are January (1.4/10), December (1.8/10), February (3.7/10). These months typically combine less comfortable temperatures, higher rainfall or fewer days with 6+ hours of sunshine.
When is the rainy season in Symi?
December is the wettest month in Symi, averaging about 202 mm of rainfall. July is the driest, at roughly 2 mm.
Which is the sunniest month in Symi?
May sees the most sun in Symi, with about 31 days with 6+ hours of sunshine on average - ideal for outdoor plans.
Is Symi a good destination for beach and coastal travel?
Symi is well suited to beach and coastal travel. Its highest Ideal Weather window (June, July, August, September, October, May) aligns with the conditions travelers usually look for in this style of trip.
How is the bestime.to score for Symi calculated?
Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Symi: temperature comfort, precipitation, humidity, daylight hours, and days with 6+ hours of sunshine - weighted for beach and coastal travel.

Climate data: Open-Meteo ERA5 historical archive, the five most recent complete years (2021–2025). Scores are monthly averages for that window, not forecasts, and short-window precipitation can differ from longer-term normals. “Sunny days” count days with at least 6 hours of measured sunshine — they are not dry days.

12

Explore by month

Curated in Symi

Tickets & experiences