Early September 1 September
79°F
Typical afternoon high
27% historical wet-day frequency
Portugal · Beach
Azores
in September.
Is September a good time?
Warm days.
Fewer overnight stays than August.
September averages 77°F afternoons and 74°F seas, with about 8 rain days. Later September is typically cooler.
- Afternoons
- 77°F
- Sea
- 74°F
- Visitor demand
- 82%of August peak
Historical Região Autónoma dos Açores regional averages, not a forecast or a measure of queues. Overnight demand compares average stays per day. Covers São Miguel, Ponta Delgada and Pico; conditions vary within the region.
Overall match
7.4/10 · scores & prioritiesWhat matters most?
Weather 50% · Crowds 30% · Cost 20%
#3 of 12 months here · Balanced mix
Weather8.8/10Very good
CrowdsBusy seasonvs its own year; overnight stays do not measure queuesFor its size, one of Europe's busiest this month
CostModeratefor Europe
Overall combines weather, overnight demand and cost. It does not include sea temperature.
Plan your September
What to expect.
What should I pack?
Afternoons around 77°F (25°C): T-shirt weather; nights around 66°F (19°C): light layers. About 12 hours of daylight. About 8 rain days in a typical September.
Can I swim in September?
The sea averages 74°F. Our swimming guide: comfortable for a swim. Your comfort will vary. This is open water near the coast, not a beach-specific reading.
Monthly coastal averages from NOAA, 2011–2025. Sea temperature is separate from the weather and Overall scores.
A typical day: temperatures & daylightAfternoons, nights, sea temperature & daylight Show detailsHide details
About 12 hours of daylight.
The sun rises about 07:29 and sets about 19:59 (local time, mid-month). Mornings start around 66°F (19°C); afternoons reach about 77°F (25°C). Expect rain on about 8 days in a typical September.
Typical afternoon
77°F (25°C)
average daily high, 15 recent Septembers
Night low
66°F (19°C)
average daily minimum
Sea
74°F (23°C)
comfortable; open water near the coast, NOAA satellite record 2011–2025
Daylight
12h 30m
on the 15th, computed from latitude
Early, middle or late?
Early or late September?
Early September is typically warmer. The afternoon high averages 79°F on the 1st, versus 76°F on the 30th. Historical wet-day frequency rises from 27% to 34% between those dates.
Mid September 15 September
77°F
Typical afternoon high
26% historical wet-day frequency
Late September 30 September
76°F
Typical afternoon high
34% historical wet-day frequency
Historical daily averages from 2011–2025, smoothed over two weeks. A seasonal pattern, not a forecast. This does not establish which week has the lowest prices or fewest visitors.
Daily calendar & holiday datesSeptember 2027 · historical weather & dated holidays Show calendarHide calendar
September 2027 calendar
Weather shows historical patterns, not a forecast. Holidays and events use the dates shown for 2027.
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 179° | 279° | 379° | 479° | 578° | ||
| 678° | 778° | 878° | 978° | 1078° | 1178° | 1277° |
| 1377° | 1477° | 1577° | 1677° | 1777° | 1877° | 1977° |
| 2077° | 2177° | 2277° | 2377° | 2476° | 2576° | 2676° |
| 2776° | 2876° | 2976° | 3076° |
Afternoon high rain likely (25%+) local school holidays public holiday event
School-holiday dates for September 2027 aren't available in our data yet. A day without a school marker doesn't mean schools are open.
Afternoons cool from about 79°F (26°C) in the first week to 76°F (25°C) in the last. The chance of a wet day runs 25–34%.
Crowds, cost and getting there
Visitor season
Will it be busy?
Busy season. September averages 82% of August's overnight stays per day. Fewer overnight stays than August.
Overnight stays across Região Autónoma dos Açores do not measure queues, day visitors or congestion at individual sights. For its size, one of Europe's busiest this month.
Hotel price season
Will it be cheaper?
Well above usual. Historical regional hotel revenue (2024–2025 monthly average): €78 per guest-night. An average, not a booking quote.
Fewer overnight stays do not automatically mean cheaper rooms. Check actual quotes for your trip.
Historical hotel average
€78
2024–2025 monthly average; hotel revenue per guest-night; not a current booking quote. +33% vs this region's usual month.
Portugal as a whole
Well below EU average
2024 restaurants and hotels price level: 76 where the EU average is 100. A relative index, not a room rate.
Recorded US nonstop flights · 2024
Recorded this month
from Boston, New York JFK and Newark; 2024 schedule, Eurostat
The historical regional amount comes from INE Portugal, Inquérito à Permanência de Hóspedes: hotel room revenue per guest-night; the country price level is national. Hotel averages are not live booking quotes.
Year-to-year variation
How much does September vary?
Across the recorded years
In the 15 years from 2011 to 2025, the month's afternoons averaged between 75°F (24°C) and 79°F (26°C); in 15 of them they were within 3°F (1.5°C) of the typical 77°F (25°C). Rain days ranged from 5 to 13; half the years had 5–11.
Rain days in each September
Rain days
8
at least 1 mm, typical year; about 12 in a wet year
Mostly sunny days
4 of 30
cloud cover under 30%
Years with a 95°F+ day
0 of 15
no September in the last 15 years had a day at or above 95°F (35°C)
Good weather days
24 of 30
rated very good or better
See every recorded SeptemberHistorical monthly averages, year by year Show detailsHide details
| Year | Afternoon high | Rain days |
|---|---|---|
| 2011 | 77°F | 12 |
| 2012 | 76°F | 11 |
| 2013 | 76°F | 5 |
| 2014 | 75°F | 13 |
| 2015 | 76°F | 11 |
| 2016 | 78°F | 5 |
| 2017 | 78°F | 8 |
| 2018 | 79°F | 8 |
| 2019 | 77°F | 5 |
| 2020 | 76°F | 10 |
| 2021 | 77°F | 8 |
| 2022 | 79°F | 10 |
| 2023 | 78°F | 8 |
| 2024 | 79°F | 5 |
| 2025 | 77°F | 6 |
Checked against official climate averages for Ponta Delgada (Observatorio Afonso Chaves). How we check
Compare dates
August, September
or October?
| Typical conditions | Aug | Sep | Oct |
|---|---|---|---|
| Afternoons | 80°F | 77°F | 73°F |
| Sea | 75°F | 74°F | 71°F |
| Rain days | 5 | 8 | 12 |
| Overnight demand | 100% | 82% | 58% |
August: Warmer afternoons and fewer rain days than September. More overnight demand. August guide →
October: Cooler afternoons, cooler sea and more rain days than September. Less overnight demand. October guide →
Overnight demand measures accommodation stays, not queues. Sea temperatures are monthly coastal averages.
Compare any of the 12 monthsChoose another month and compare it with September Show comparisonHide comparison
Yellow marks the top three months on the Balanced mix. September stays as your reference.
July to August have a Weather score at least 1.0 point higher than September, but more overnight stays.
Your comparison
September or August?
Overnight stays are 100% of the busiest month.
Historical regional hotel revenue (2024–2025 monthly average): €87 per guest-night. An average, not a booking quote.
Read the August guide →| Typical conditions | September | August |
|---|---|---|
| Afternoons | 77°F | 80°F |
| Nights | 66°F | 68°F |
| Sea | 74°F | 75°F |
| Rain days | 8 | 5 |
| Visitor season | Busy season | Peak season |
| Overall / 10 | 7.4 | 7.5 |
| Month rank | #3 | #2 |
Every month, in detail Show detailsHide details
| Month | Overall | Rank | High | Low | Sea | Rain days | Weather | Visitor season |
|---|---|---|---|---|---|---|---|---|
| January | 6.5 | #10 | 64°F | 54°F | 62°F | 14 | 4.5 | Low season |
| February | 6.4 | #11 | 63°F | 53°F | 61°F | 10 | 4.4 | Low season |
| March | 6.7 | #8 | 64°F | 54°F | 61°F | 10 | 4.7 | Moderate season |
| April | 6.5 | #9 | 66°F | 55°F | 62°F | 10 | 5.3 | Moderate season |
| May | 6.7 | #7 | 69°F | 58°F | 64°F | 9 | 6.4 | Busy season |
| June | 7.2 | #5 | 73°F | 62°F | 67°F | 4 | 8.2 | Busy season |
| July | 7.6 | #1 | 78°F | 66°F | 72°F | 2 | 9.8 | Peak season |
| August | 7.5 | #2 | 80°F | 68°F | 75°F | 5 | 10.0 | Peak season |
| September | 7.4 | #3 | 77°F | 66°F | 74°F | 8 | 8.8 | Busy season |
| October | 7.2 | #6 | 73°F | 62°F | 71°F | 12 | 6.9 | Moderate season |
| November | 7.4 | #4 | 68°F | 58°F | 67°F | 12 | 5.7 | Low season |
| December | 6.4 | #12 | 65°F | 55°F | 64°F | 14 | 4.4 | Low season |
Elsewhere in Europe
Better September weather than Azores
Azores' weather ranks 41 of 77 beach regions this month. These beach regions outside Portugal have clearly better weather on your dates, nearest first, each compared with Azores.
Canary IslandsSpain · about 960 miles
Excellent weather (10.0): 3°F warmer afternoons, pricier
CeutaSpain · about 1220 miles
Excellent weather (10.0): 2°F warmer afternoons, 6 fewer rain days, cheaper
AndalusiaSpain · about 1230 miles
Excellent weather (10.0): 9°F warmer afternoons, 5 fewer rain days, pricier
CorsicaFrance · about 1920 miles
Excellent weather (9.8): 2°F warmer afternoons, 4 fewer rain days, quieter for its season (moderate season), pricier
SardiniaItaly · about 1930 miles
Excellent weather (9.8): 6°F warmer afternoons, 4 fewer rain days, pricier
How we knowSources, regional scope & scoring method Show detailsHide details
It's busy season, 82% of the busiest month and 45% above its average month. That means about 12,000 overnight visitors on a typical September night across the region, 28% of them from Portugal itself. Rentals booked through Airbnb, Booking, Expedia and Tripadvisor add up to 7,800 more: 63 for every 100 counted above. Some are the same properties counted twice.
| Climate suitability (HCI:Beach, 0–100) | 79 |
| How our weather was checked | Official climate averages for Ponta Delgada (Observatorio Afonso Chaves) from the national weather service, every month: afternoon highs typically within 1°F (0.6°C), night lows within 1°F (0.2°C). |
| Tourist nights per 1,000 residents per day | 51 |
| Busiest month here | August · 62 |
| Visitors as share of people present | 4.8% |
| Rank among Europe's regions this month | 90th percentile |
| Domestic share of nights | 28% |
| Platform rental nights per 100 counted nights | 63 |
| Visitor share if every platform night were extra | 7.7% |
| Population used | 242,000 |
| Statistical region | PT20 · Região Autónoma dos Açores |
Crowds: Eurostat nights spent at tourist accommodation, by month and NUTS 2 region, 2024–2025 average. Overnight visitors per night is the month's nights divided by its days; the per-1,000 figure is Eurostat's, against each year's population. Platform rentals: Eurostat nights booked via Airbnb, Booking, Expedia and Tripadvisor, 2024–2025 average, shown separately because some properties are in both counts. Weather: Holiday Climate Index computed from ERA5 reanalysis with daily highs, night lows and rain days corrected from open national weather-service station records, 2011–2025, population-weighted to the region; day-by-day figures are the same data averaged by date. Heat and rain odds are counted across those years. Sunrise and sunset: NOAA solar equations, local time. Prices: Eurostat price level index and HICP, national; the first figure is regional (INE Portugal, Inquérito à Permanência de Hóspedes: hotel room revenue per guest-night). Full method · this region's data.