Benagil in March: Weather, Sea Temperature and Getting to the Cave

BENAGIL · MARCH · ALGARVE COAST

The sea cave is why people pick Benagil, and March hands over the cliffs above it almost empty. Portugal’s national weather service puts the month at an average high of 66.0°F (18.9°C) and an average low of 51.4°F (10.8°C), which is fleece at breakfast and shirtsleeves by one o’clock. What March does not hand over is a warm ocean: the water off these cliffs averages 60.9°F (16.1°C), colder than the air that dries you.

The rest of the month follows from one gap in the record. Rain falls on 5.6 days, daylight runs a clean twelve hours by mid-month, and the cave itself can only be entered from the water, by boat, kayak or paddleboard. No station along this stretch publishes the sea state, and that is the number deciding whether a crossing runs. So book nights rather than a morning: two or three based near Carvoeiro or Lagos give the weather a second chance at you.

On this page

• Benagil weather in MarchHighs of 66.0°F, lows of 51.4°F, 5.6 rain days
• Can you swim in March?A 60.9°F sea, and what that does to a swim
• How crowded Benagil is in MarchWinter scale, and what we could not price
• Things to do in Benagil in MarchThe cave, Praia da Marinha, Carvoeiro, Ponta da Piedade
• A two-day plan for BenagilTwo mornings at the pier, one afternoon on the cliffs
• March or April in the Algarve?How February, March and April compare
• Is March a good time to visit Benagil?Our verdict, for walkers and for swimmers

Every figure here is a March normal for this coast, read at sea level. The Algarve’s inland hills run colder and far wetter than that, so the normals below will not dress you for a mountain trail. And for everything that does not move with the date, the drive, the beaches, where to sleep, our Algarve guide carries it.

Benagil weather in March: average highs, lows and rain days

These numbers come off a thermometer, not a model. IPMA, Portugal’s institute for the sea and the atmosphere, runs station 554 at Faro, five meters above the water, and its 1991-2020 normals give March an average high of 66.0°F, an average low of 51.4°F and 1.84 inches of rain. A reanalysis grid cell would smooth the same coast into something plausible. We would rather tell you where the instrument stands: at Faro, about 60 km (37 miles) east, the same town most American trips fly into.

Rain shows up on 5.6 days in an average March, counting anything from 0.04 inch upward, which works out at roughly one day in five with something on the windshield. Only 1.6 of those days deliver 0.39 inch or more, so a normal March holds about a day and a half of genuine weather and four or five that spit before breakfast and clear by lunch. Watch the threshold: IPMA counts from 0.04 inch while American tables usually start at 0.10 inch, so these counts do not swap with the ones in your forecast app.

Between the low and the high sits 14.6°F of daily swing, and on an exposed coast you feel it at both ends of the day. A terrace breakfast wants a fleece, the one o’clock clifftop wants a shirt, and the wind off the Atlantic makes the gap feel wider than the thermometer admits. Pack a windproof shell, one warm mid layer and shoes with grip for wet limestone. Our Portugal packing guide handles the rest of the suitcase.

Daylight runs a clean 12 hours on March 15, and the light goes at 6:40 p.m. local time, leaving an unhurried hour between the end of a coast walk and dinner. That margin matters in a month when crossings are decided in the morning: an outing scrubbed at nine can still go out after lunch with light to spare.

Can you swim in Benagil in March? Sea temperature and what it feels like

The water off Benagil averages 60.9°F (16.1°C) in March, from the Open-Meteo Marine API over 2015 to 2024. Read the small print with it: that average is built from daily maxima, the warmest reading of each day, so it sits a shade above a true 24-hour mean. Take 60.9°F as the friendly end of what this sea does in March, not as the number waiting for you at nine in the morning.

At that temperature the Atlantic is swimmable and briefly enjoyable rather than welcoming. A rented wetsuit turns a two-minute dip into an hour of snorkeling, and the kayak and paddleboard crowd wear one as a matter of course. Bare skin gets the full cold-water entry: go in slowly, keep the first swim short, and remember the air only climbs to 66.0°F to dry you afterward. Children last about as long as it takes to shout.

We could not find a station on this stretch publishing wave height or swell, so we give no figure for either, and that gap is the most practical thing to know about a March trip. The cave opens to the water, which means a calm morning on land tells you very little about whether a hull can get under the roof. Ask your operator the evening before, ask again at the pier, and keep a second morning in the plan.

How busy is Benagil in March? Crowds, prices and when to book

March sits in the Algarve’s quiet stretch, before the spring holiday traffic and a long way before the July and August machine. We found no occupancy series and no monthly room-rate series for Benagil, so we crown no month cheapest and none most expensive. What we can say is that the beach parking, the handful of terraces and the coast path are all working at winter scale, and that a March weekend here looks nothing like the summer photographs that sold you the place.

We could not verify booking lead times for hotels or rentals along this coast, so we give no number of weeks. The choice that genuinely changes your March is the number of nights rather than the date on them: three nights near Carvoeiro or Lagos buy three separate mornings at the water, and one night buys a coin toss. A rental car is close to compulsory for the cove beaches, and our car guide covers the tolls and the insurance line.

On the tourist tax, we could not verify whether a nightly charge applies in this municipality for 2026 or what it would amount to, so we give no rate. Ask the property when you book, and read the final line of the confirmation rather than the headline price. Our Portugal trip cost guide sets out the other charges that land at checkout.

If one line of the budget deserves stretching in March, it is the extra night, not the sea view. A crossing that cannot run on Tuesday often runs on Wednesday, and the only thing that buys that second attempt is having somewhere to sleep within twenty minutes of the pier. The rest of the coast costs what it costs in a quiet month, and the clifftop walking costs nothing at all.

Things to do in Benagil in March

March gives you what July cannot: the clifftop in walkable air. At 66.0°F the trail along the headlands is a jacket-and-water-bottle affair rather than an exercise in heat management, the wildflowers are out in the scrub, and the coves below are quiet enough to hear the swell working the rock. The same walk in August is done before eight in the morning or not at all.

Benagil’s own beach is small and steep, and the cave sits around the headland, out of sight from the sand and reachable only from the water. A short drive west, Carvoeiro adds a proper village and the boardwalks over the Algar Seco rocks. East, Praia da Marinha is the arch on every postcard. Further west again, the stacks of Ponta da Piedade take half a day out of Lagos.

The rock does not change with the month; the air and the water do, and they move at different speeds. Since February the average high has climbed 3.4°F, while the sea has slipped from 61.3°F to 60.9°F. Walking therefore improves week by week through March and swimming does not, which is why the month belongs to the tops of the cliffs and to whoever owns a wetsuit.

Nothing on the coast path asks for a ticket. The viewpoint above the cave, the steps down to Benagil beach and the whole run of clifftop between the coves are as free in March as in August, with the difference that you share them with walkers instead of a beach crowd. What is not free is the crossing, and access rules for the inside of the cave have changed in recent years, so put that question to your operator when you book rather than at the pier.

Benagil in March: a two-day itinerary

Day one runs on the morning sea. Breakfast at eight in Carvoeiro with the fleece still on, at the pier by nine for the crossing if it is going, back on land by late morning while the air is still climbing toward 66.0°F. Lunch on a terrace out of the wind, then the clifftop east toward Praia da Marinha through the early afternoon, when the light is high and the arches show their color. Give the last hour before 6:40 p.m. to the cliff edge above the cave, then dinner in the village.

Day two is the insurance policy you paid for with the extra night. If yesterday’s boat went out, spend it west at Lagos and the stacks of Ponta da Piedade with a long lunch; if it did not, you are back at the pier at nine. Should one of March’s 1.6 heavy days land on your trip, drive to Faro for the walled old town and an indoor lunch, keep the boots dry, and look at the forecast again over dinner.

Benagil in March vs February and April

Set the three side by side and March is the wet one: 1.84 inches against February’s 1.65 and April’s 1.54, spread over 5.6 days against 5.4 and 5.3. Air warms in an orderly line, 62.6°F to 66.0°F to 69.3°F for the daytime average. Water temperature does not follow it, running 61.3°F in February, 60.9°F in March and 63.5°F in April, which leaves March holding the coldest sea of the three by four tenths of a degree.

Push the trip four weeks later and you collect 3.3°F more daytime warmth, 0.30 inch less rain and 2.6°F more in the water, the sea’s biggest single move across these three months. What you hand back is a share of the quiet, as the coast fills with the spring holidays. Pull it four weeks earlier and you get water marginally warmer than March at 61.3°F over air that is 3.4°F colder, a trade almost nobody wants.

Is March a good time to visit Benagil?

For walkers, photographers and anyone whose good day ends with grilled fish at seven, March is a yes with no conditions attached. For swimmers, and for families planning beach days, it is a no: 60.9°F water under a 66.0°F afternoon does not make a beach vacation, whatever the light in the photographs promises. Wetsuit people sit happily in the middle, and they are the ones who get the cave to themselves.

If the answer is no, April is the fix rather than a different destination: 69.3°F days, 63.5°F water and 1.54 inches of rain, the warmest and driest of the three months we can put real normals against. Later in spring warms further again, and our month-by-month verdict for Portugal makes that case with its own figures.

Of the three, March is the one that puts spring air over a winter sea, an odd and rather wonderful combination when what you came for is the cliff top rather than the swim.

The last word

Book the second morning. Everything worth the flight here, the cave, the paddle, the arches seen from the waterline, hangs on a sea state that no station on this coast publishes, and the only reliable hedge is another night and another nine o’clock at the pier. The waiting is no hardship in this month: on March 15 the sun comes up at 6:40 in the morning and goes down at 6:40 in the evening, twelve hours split exactly down the middle, with the cliffs lit at both ends of it.

Sources & data for this guide

• March air normals, 66.0°F high, 51.4°F low, 1.84 in, plus the 5.6 and 1.6 rain-day counts · IPMA, normais climatológicas 1991-2020, station 554 Faro, 5 m · checked Sep 23, 2026
• February and April normals used in the comparison · same IPMA station and same 1991-2020 period · checked Sep 23, 2026
• Sea surface of 60.9°F in March, 61.3°F in February and 63.5°F in April, each a mean of daily maxima · Open-Meteo Marine API, 2015-2024 average · checked Sep 23, 2026
• Daylight of 12 h 00 m and the 6:40 sunrise and sunset on March 15 · sunrise-sunset.org · checked Sep 23, 2026
• Scope caveat: the air readings are measured at Faro, about 60 km (37 miles) east, at 5 m altitude. Inland high ground in the Algarve is colder and considerably wetter.
• What we could not verify: no occupancy series, no monthly room-rate series, no 2026 boat or kayak fare and no municipal tourist-tax rate, so we publish no prices. No station on this stretch publishes wave height, so we publish no swell figure. Operator schedules and cave access rules change · check with operators when you book.

To plan your stay

• Best Time to Visit Benagil: Sea Temperature, Rain Days and the Quiet Months
• Benagil in February: Weather, Sea Temperature, Crowds and a Two-Day Plan
• Benagil in April: Weather, Sea Temperature, Crowds and How It Compares to March and May
• Benagil in January: Weather, Sea Temperature and Crowds

Nearby places

• Albufeira, Portugal: The Three Zones, the Beaches and the Old Town Hill
• The Algarve: Beaches, Towns and the Two Coasts of Portugal's South
• Carvoeiro, Portugal: the Cove, Algar Seco and the Seven Hanging Valleys Trailhead