THE AZORES · AUGUST · 37.7° N
Ponta Delgada in August runs to an average high of 78.8°F (26.0°C) and a sea surface averaging 77.0°F, the warmest water these islands get all year. That pairing is the whole argument for the month. The Azores still refuse to do Mediterranean heat: the average low holds at 67.8°F, and rain turns up on 6.5 days of a normal August.
What August takes back is elbow room. Ponta Delgada has charged a municipal tourist tax since January 2025, mainland Portugal takes its holidays in the same four weeks, and the road to Sete Cidades carries all of it before nine. The light compensates a little: on August 15 the sun sets at 8:36 p.m. local time.
THE MONTH AT A GLANCE · THE AZORES IN AUGUST
August hands you the year’s warmest sea at 77.0°F and the archipelago’s busiest weeks in the same booking, with 6.5 wet days built into the average.
SEA AT 77.0°F · 6.5 WET DAYS · 13 H 39 MIN OF DAYLIGHT ON AUG 15
Go for: the warmest sea of the year, summer cetaceans (sperm, sei and other baleen whales, spotted dolphins), and light that holds until 8:36 p.m.
Think twice before: planning a mountain day on coastal numbers, or arriving without the tourist tax quoted in writing by your property.
Normals: IPMA station 513, Ponta Delgada Observatório · Sea: Open-Meteo Marine · full sources at the end
On this page
- Average highs, lows and rain daysAzores weather in August
- Sea temperature in August77.0°F, and what it feels like
- Crowds, prices and the tourist taxThe demand peak, and what we can document
- Whale watching, Furnas and the tea plantationsThings to do in August
- A two-day plan for São MiguelThe August itinerary, hour by hour
- August vs July and SeptemberThree months, rain and sea
- Is August a good month to go?The verdict, for whom yes and for whom no
One caution before the figures: São Miguel’s south coast and its ridges do not share weather. The normals here are measured at Ponta Delgada Observatório, 35 meters above the harbor, and high ground is colder and far wetter, so a hike toward Pico da Vara wants more than a coastal reading. For the mainland calendar, Portugal month by month covers the other side of the ocean.
Azores weather in August: average highs of 78.8°F and 6.5 rain days
| August at Ponta Delgada | Value |
|---|---|
| Average high | 78.8°F (26.0°C) |
| Average low | 67.8°F (19.9°C) |
| Precipitation | 1.80 in |
| Days with 0.04 in (1 mm) or more | 6.5 |
| Days with 0.39 in (10 mm) or more | 1.1 |
| Daylight, August 15 | 13 h 39 min |
| Sea surface (mean of daily maxima) | 77.0°F (25.0°C) |
These numbers come from a thermometer, not a model grid cell. IPMA, Portugal’s national weather service, keeps station 513 at Ponta Delgada Observatório, 35.0 m above sea level, and its 1991 to 2020 normals give August an average high of 78.8°F (26.0°C), an average low of 67.8°F (19.9°C) and 1.80 inches of rain. Read all of it as the south coast of São Miguel. Higher ground is colder and considerably wetter, and the far end of a coast keeps its own sky.
Rain falls on 6.5 days in an average August, counted at IPMA’s threshold of 1 mm (0.04 inch) or more. Only 1.1 of those days reaches 10 mm (0.39 inch). American tables usually count from 0.10 inch, so the two figures are not interchangeable, and the Azorean count picks up drizzle a US chart would drop. In a week, that shape is one genuinely wet afternoon and a handful of showers that pass while you finish lunch under an awning.
Eleven degrees separate the average high from the average low, which is modest by continental standards and enough to change a lookout. Lagoa do Fogo sits high and exposed, and it can be in cloud while the harbor is bright. Pack a light shell and one warm layer on top of the swimsuit. Our Portugal packing list handles the rest of the bag.
On August 15 the sun clears the horizon at 6:57 a.m. and sets at 8:36 p.m. Azores summer time (UTC+0), for 13 hours 39 minutes of daylight. That buys a real evening after a beach afternoon: dinner at nine happens in the last of the light, and the drive down from a crater rim does not have to be done in the dark.
Can you swim in the Azores in August? Sea temperature at 77.0°F
Sea surface off the Azores averages 77.0°F (25.0°C) in August, from the Open-Meteo Marine series over 2015 to 2024. One caveat carries real weight: that average is built from daily maxima, the afternoon reading, so it sits a shade above a true 24-hour mean. Morning water is a touch cooler than the headline suggests, which matters at 8 a.m. on a black-sand beach.
In practice, 77.0°F is stay-in water for most Americans, near the temperature of a heated hotel pool. It is also the annual ceiling. July averages 73.1°F and September 75.3°F, and those four degrees between July and August are the difference between a bracing plunge and an hour of floating. Children last longer in it, and snorkeling stops being a test of stubbornness.
On wind and swell, our sources carry no August statistics for the archipelago, and we won’t manufacture any. What is documented: a whale-watching trip runs about three hours offshore, and Visit Azores recommends a minimum age of five, on the grounds that a sea an adult calls calm can be hard on a small child. Ask your operator what conditions they cancel for, and get the answer before you pay.
How busy are the Azores in August? Peak demand and the Ponta Delgada tourist tax
August is the archipelago’s demand peak, and that comes without a percentage attached, because no verified occupancy or rate series for the Azores sits in our sources. The direction of travel is documented, though. Mainland Portugal takes its holidays in these same four weeks, and São Miguel counted 137,856 residents at the 2011 census across 744.7 square kilometers, with most of the island’s beds clustered in and around Ponta Delgada.
Rather than invent a lead time in weeks, book by constraint. The dated items are the boat trip, which runs about three hours on a fixed morning departure, and any Furnas thermal pool on a rainy afternoon, when half the island has the same idea at the same hour. The car matters more than the room: read renting a car in Portugal before assuming you can add one on arrival.
Ponta Delgada has charged a municipal tourist tax since January 2025, and the city runs a dedicated platform for it. We read that platform, and its rate leaflet sits behind a login. Press reports and host guides agree on EUR 2 per person per night for guests aged 13 and over, capped at three consecutive nights, so roughly EUR 6 a head, with exemptions for under-13s, medical stays, disability of 60 percent or more, and Azorean residents. Treat those figures as unconfirmed and ask your property to quote the tax in writing.
The cap decides the bill, and Portugal’s caps differ: Porto charges EUR 3 a night up to seven nights (EUR 21), Funchal EUR 2 up to seven (EUR 14), Ponta Delgada EUR 2 up to three. A fortnight in Porto and a fortnight on São Miguel do not carry the same line. The one place where paying up genuinely changes August is the car, since an 8:36 p.m. sunset is wasted if you can only watch it from the harbor.
Things to do in the Azores in August: whale watching, Furnas and the tea plantations
August is a summer-species month in one of the largest whale sanctuaries on the planet, where more than 20 cetacean species have been recorded, roughly a third of all that exist. Visit Azores lists sperm whales, sei whales and other baleen whales as frequent in summer, along with spotted dolphins. Common dolphins and bottlenose dolphins are resident in any month, and swimming with them is permitted. Blue whales are the late-winter act, so August is the wrong month to chase one.
Terra Nostra Park at Furnas, a thermal pool inside a botanical garden, prices at around EUR 16 for a visiting adult against about EUR 12.80 for a resident, under-6s free. We could not read those figures on the park’s own site, which returns a 404, or the regional tourism portal, which returns a 403, so take them as an order of magnitude and confirm at the gate. Gorreana, growing tea since 1883 and billed as Europe’s oldest plantation, and Porto Formoso both run visitable museum-factories, with no opening hours we could verify from a primary source.
The set pieces cost nothing but the drive. Vista do Rei looks down on the Green and Blue lakes of Sete Cidades, and Lagoa do Fogo is wilder, higher and equally free. Furnas’ fumaroles steam beside the road. At Ribeira Grande, the Caldeiras put an 1811 thermal building among trees and vents. Ponta Delgada’s waterfront has fronted the island’s capital since 1546, when the title moved over from Vila Franca do Campo after the earthquake of 1522.
The Azores in August: a two-day itinerary on São Miguel
Day one goes west early. Leave Ponta Delgada by 8 a.m., because Sete Cidades stacks cloud as the morning warms, and take Vista do Rei first. Mid-morning, drop to the lake shore, then cut back east for lunch. Early afternoon belongs to the water, while it sits at its 77.0°F daily peak. From six, climb to Lagoa do Fogo, where the light holds to the 8:36 p.m. sunset and the parking thins as the day-trippers head down.
Day two starts offshore: a three-hour whale trip on a morning departure, minimum age five. The afternoon runs to Furnas, dozens of springs and fumaroles in one valley, with Poça da Beija’s clear water and ferrous mud, or Terra Nostra for the long soak. If the sky turns, and 1.1 day in an average August brings 0.39 inch or more, thermal water is the plan rain improves. Indoor fallbacks: the Gorreana factory tour and the Caldeiras at Ribeira Grande.
The Azores in August vs July and September: rain days and sea temperature
| Measure | July | August | September |
|---|---|---|---|
| Average high | 76.5°F | 78.8°F | 77.0°F |
| Average low | 66.0°F | 67.8°F | 66.4°F |
| Precipitation | 1.02 in | 1.80 in | 3.08 in |
| Days with 0.04 in or more | 4.8 | 6.5 | 9.4 |
| Sea (mean of daily maxima) | 73.1°F | 77.0°F | 75.3°F |
July is the driest of the three by a clear margin: 1.02 inches over 4.8 wet days, against August’s 1.80 inches over 6.5 and September’s 3.08 inches over 9.4. Air temperature barely moves across the summer, running 76.5°F, 78.8°F and 77.0°F. The water is where the three months separate, at 73.1°F, 77.0°F and 75.3°F, all measured the same way, as means of daily maxima over 2015 to 2024.
Shift four weeks back to July and you buy the driest month of the Azorean summer, paying for it with a sea nearly 4°F cooler. Shift four weeks forward to September and the water still reads 75.3°F, while wet days climb from 6.5 to 9.4 and rainfall nearly doubles. Neither swap moves the thermometer much. Both change what an afternoon can hold.
Is August a good time to visit the Azores?
Yes, if you came to be in the water. August delivers the year’s warmest sea at 77.0°F, 13 hours 39 minutes of daylight in mid-month, and summer cetaceans on the same boats that sail all year. The answer turns to no if quiet roads and a cheap room are the point, because these four weeks are when the whole of Portugal takes its holiday and Ponta Delgada’s beds fill accordingly.
For readers in that second camp, September deserves a look. The water stays at 75.3°F, only 1.7°F below August, and the pressure eases once mainland schools go back. Rain is the price: 3.08 inches across 9.4 wet days, against 1.80 inches across 6.5. Anyone who values dry weather above warm water should take July instead, at 1.02 inches and 4.8 wet days.
What no other month stacks in one week: the sea at its annual maximum and a sunset at 8:36 p.m., which is what lets a six o’clock swim and an eight o’clock lookout fit into a single evening.
The last word
Book the boat for your first full morning and hold the second as your rebooking slot, because the sea gets the final say on departures. Then keep the scale of the island in mind under those coastal numbers: São Miguel runs 62.1 km end to end and 15.8 km at its widest, and Pico da Vara reaches 1,105 m. The thermometer that gave you 78.8°F stands 35 m above the harbor, and the ridge you cross to reach Furnas has never once read it.
Sources & data for this guide
- August normals (78.8°F / 67.8°F / 1.80 in) · IPMA, 1991–2020, station 513 Ponta Delgada Observatório, 35.0 m · checked Sep 9, 2026
- Rain-day counts and their 1 mm / 10 mm thresholds · IPMA, same station and period · checked Sep 9, 2026
- July and September normals and rain days · IPMA, same station and period · checked Sep 9, 2026
- Sea surface 77.0°F, 73.1°F and 75.3°F, means of daily maxima 2015–2024 · Open-Meteo Marine API · checked Sep 9, 2026
- Sunrise 6:57 a.m., sunset 8:36 p.m. and 13 h 39 min on August 15 · sunrise-sunset.org, converted to Azores summer time · checked Sep 9, 2026
- Whale seasons, 20+ species, three-hour trips, minimum age five · Visit Azores (official regional tourism) · checked Sep 9, 2026
- São Miguel geography, Furnas springs, Gorreana and Porto Formoso, Sete Cidades and Lagoa do Fogo, capital since 1546 · Visit Azores · checked Sep 9, 2026
- Terra Nostra prices (about EUR 16 / EUR 12.80) · unread on parqueterranostra.com (404) and turismo.azores.gov.pt (403), figures relayed secondhand · attempted Sep 8, 2026, confirm at the gate
- Ponta Delgada tourist tax · taxaturistica.cm-pontadelgada.pt read Sep 9, 2026, the tax is confirmed and the rate leaflet is behind a login; EUR 2 per night with a three-night cap comes from Jornal de Notícias and Correio dos Açores, unconfirmed
- Porto (EUR 3, 7-night cap) and Funchal (EUR 2, 7-night cap) · municipal sources · checked Sep 9, 2026
- Crowd levels are editorial: we hold no verified occupancy or rate series for the Azores in August, and opening hours for the tea factories could not be verified · check operators when you book.