Best time to visit Skiathos

Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.

Sea feels bathtub at 29°C
26° strict 31° tolerant

Default 29 °C is the Beach Climate Index "bathtub" line (Morgan et al.) — where the sea stops being refreshing and starts feeling like a warm bath.

Saved to this browser. Changes update the strips below.
Sea temp cold <18° chilly 18–21° ideal 22–26° warm 27–28° bathtub 29–30° too warm ≥31°
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Sea Nov 2022 – Dec 2024 (?)
Day · avg daily high (?)
Night · avg overnight low (?)
UV index · On a typical day around midday, UV is about this (?)
224578986421
On the sunniest 1 in 10 days, UV reaches this — and even higher
37973
PM2.5 air quality · on a typical day (?)
789889888878
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
121314131212121212131214
June 9/10 feels 25°C · HCI 93/100
Day 24° · Night 22° ☀ UV 8.3 (very high) 77% humidity 25 km/h wind 2 rain days (22h) 307h sun sea 24°C
Thermal 7
Sky 10
Rain 10
Wind 9

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.

Compare with another destination

Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.

Tours in Skiathos

9 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Skiathos).

  1. 1Private Boat Cruise around Skiathos island5.00★ (34)from $1409
  2. 2Island Hopping from Skiathos4.66★ (146)9hfrom $71
  3. 3Private Skopelos Island Boat Cruise Tour to Mamma Mia Sites4.90★ (20)from $630
  4. 4Day sailing Skiathos Skopelos with lunch on Rainbow yacht4.98★ (429)7hfrom $155
  5. 5Sea and Sun day cruise from Skiathos3.95★ (56)7hfrom $55
  6. 6SemiPrivate Trip on 50ft Traditional Wooden Boat with Greek Lunch5.00★ (142)from $155
  7. 7All-Inclusive Full-Day Cruise & Lunch4.94★ (125)7hfrom $160
  8. 8All-Inclusive Semi-Private Sailing Cruise4.99★ (86)7hfrom $149
  9. 9Mamma Mia Cruise From Skiathos Island3.50★ (46)7h 30mfrom $61

Last refreshed 2026-10-18.

Similar climatesMonopoli92% · Chania91% · Zadar91%

Other destinations with the most-alike year-round climate to Skiathos (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Skiathos's. Based on the 2020-2024 climatology, not this year's actual weather.

Month-by-month

Month Temp °C Feels °C Rain days Rain h Rain h/day Humidity Wind km/h Sun h UV Interest Score
Jan 11–13 8 12 146 12.2 69% 38 161 2 Quiet 6
Feb 11–14 9 9 123 13.7 71% 35 171 2 Quiet 7
Mar 11–14 10 10 142 14.2 71% 32 202 4 Quiet 6
Apr 14–16 13 6 69 11.5 74% 30 237 5 Quiet 8
May 17–19 18 5 45 9.0 77% 26 278 7 Moderate 9
Jun 22–24 25 2 22 11.0 77% 25 307 8 Busy 9
Jul 25–27 29 2 14 7.0 72% 27 317 9 Peak 9
Aug 26–28 29 3 29 9.7 71% 27 297 8 Peak 8
Sep 23–25 25 6 88 14.7 69% 30 244 6 Moderate 9
Oct 19–21 20 6 72 12.0 70% 29 211 4 Quiet 9
Nov 16–18 15 7 99 14.1 71% 32 168 2 Quiet 8
Dec 13–15 12 11 145 13.2 74% 33 152 1 Quiet 6

UV Index in Skiathos by Month

UV index in Skiathos peaks at 9 (very high) in July, dropping to 1 (low) in December. June, July reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.

Best months in detail

June

9/10

22–24°C · 2 rain days (22h) · 307 sun hours · 77% humidity · Busy crowd · UV 8 (very high)

May

9/10

17–19°C (feels 18°C) · 5 rain days (45h) · 278 sun hours · 77% humidity · Moderate crowd · UV 7 (high)

October

9/10

19–21°C (feels 20°C) · 6 rain days (72h) · 211 sun hours · 70% humidity · Quiet crowd · UV 4 (moderate)

Every month

Show the other 9 months in detail

January

6/10

11–13°C (feels 8°C) · 12 rain days (146h) · 161 sun hours · 69% humidity · Quiet crowd · UV 2 (low)

February

7/10

11–14°C (feels 9°C) · 9 rain days (123h) · 171 sun hours · 71% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

March

6/10

11–14°C (feels 10°C) · 10 rain days (142h) · 202 sun hours · 71% humidity · Quiet crowd · UV 4 (moderate)

April

8/10

14–16°C (feels 13°C) · 6 rain days (69h) · 237 sun hours · 74% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

July

9/10

25–27°C (feels 29°C) · 2 rain days (14h) · 317 sun hours · 72% humidity · Peak crowd · UV 9 (very high)

August

8/10

26–28°C (feels 29°C) · 3 rain days (29h) · 297 sun hours · 71% humidity · Peak crowd · UV 8 (high) · sunniest 1 in 10 days reach 9 (very high)

September

9/10

23–25°C · 6 rain days (88h) · 244 sun hours · 69% humidity · Moderate crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 7 (high)

November

8/10

16–18°C (feels 15°C) · 7 rain days (99h) · 168 sun hours · 71% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

December

6/10

13–15°C (feels 12°C) · 11 rain days (145h) · 152 sun hours · 74% humidity · Quiet crowd · UV 1 (low)

Frequently asked questions about visiting Skiathos

When is the best time to visit Skiathos?

June is the highest-scoring month (9/10 on the Holiday Climate Index). Typical conditions: 22–24°C (2 rainy days). The top three months by score are June, May, October.

What is the worst time to visit Skiathos?

January is the lowest-scoring month (6/10). Typical conditions: 11–13°C (12 rainy days).

When are crowds lowest in Skiathos?

Search-interest seasonality (Google Trends 2021-2025) is lowest in November and peaks in July. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.

Which months in Skiathos have good weather but fewer tourists?

October (climate 9/10, crowd index 5) and April (climate 8/10, crowd index 30) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Skiathos by month?

UV peaks at 9 (very high) in July and is lowest in December at 1 (low). Monthly peak values: Jan 2, Feb 2, Mar 4, Apr 5, May 7, Jun 8, Jul 9, Aug 8, Sep 6, Oct 4, Nov 2, Dec 1. June, July reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.

What is the UV index in Skiathos in July?

July is the peak UV month in Skiathos, with a daily-peak UV index of 9 (very high). At this level, sunburn can occur in under 20 minutes on unprotected fair skin. Apply SPF 50+, wear protective clothing and a hat, and avoid direct midday sun (11:00–17:00).

How high can UV get in Skiathos on the sunniest days?

Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. August is the worst case: typical days average UV 8 (high), but the top 10% of days reach UV 9 (very high) — and even higher. Months where the sunniest days routinely exceed the typical reading: February, April, August, September, November. Plan sun protection for the worst case, not the average.