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When to go · Costa Rica

Costa Rica in September

Mixed month. Wettest on the Pacific; driest on the Caribbean — switch sides.

Key facts

Verdict
Mixed
Crowds
Low
Costa Rica
Prices
Low
Costa Rica

Verdict

MixedVoykit month rating for Costa Rica

Wettest on the Pacific; driest on the Caribbean — switch sides.

Is another month better than September?

September is rated mixed. These months rate higher:

Weather in September

  • Guanacaste and the north Pacific · Liberia, Tamarindo, Nosara, Santa Teresarainy

    The driest region: brown hills and hot days Dec–Apr; a short dry spell (veranillo) in July.

  • Central and south Pacific · Manuel Antonio, Uvita, Osa, Corcovadorainy

    Very wet Sep–Oct; some Osa lodges close and Corcovado can shut in October (check).

  • Central Valley and mountains · San José, Monteverde, Poás, Irazúrainy

    Spring-like 18–26 °C (64–79 °F); Monteverde is cool, windy and misty — pack a fleece.

  • Northern plains · La Fortuna, Arenalfine

    Rain any month; Arenal's cone is often in cloud — mornings are clearest.

  • Caribbean · Puerto Viejo, Cahuita, Tortuguerobest weather

    Reverse pattern: September–October are the driest months; Nov–Jan the wettest.

  • Central Pacific: Jacó and the central coast · Sea level, Tárcoles to Queposrainy

    Dry season roughly December to April; heaviest rain September–October, often in afternoon bursts.

  • Central Pacific: Gulf islands and Montezuma side · Nicoya Gulf coastrainy

    Similar pattern; the gulf crossing can be rough in wind.

  • Central Valley: Central Valley floor · San José, Alajuela, Heredia, Cartagorainy

    December–April is the driest window; May–November brings afternoon showers. Temperatures sit around 20–26 °C (68–79 °F) by day and 10–15 °C (50–59 °F) at night year-round.

  • Guanacaste: Guanacaste coast and lowlands · Liberia, the beach strip, Nicoyarainy

    Dry season roughly December to April with strong sun and wind; rain concentrates June–October, often as afternoon showers. The province is hotter and drier than the rest of Costa Rica.

  • Limón Province: Caribbean coast (Puerto Limón to Sixaola) · Sea-level lowlands along the coast roadbest weather

    No true dry season. September and October are the driest months; February and March are the next best. Expect 27–31 °C (81–88 °F) year-round and short heavy showers.

  • Limón Province: Tortuguero and the canals · Northern Limón, boat access onlybest weather

    Rain almost daily; turtle nesting peaks July to October, with green turtles the main species.

  • North Costa Rica: La Fortuna / Arenal · Volcano foothills and lake basinrainy

    Driest stretch is roughly December to April; the rest of the year is green and wet, with afternoon downpours. Arenal is often cloud-covered — mornings give the clearest views.

  • North Costa Rica: Sarapiquí and the northern lowlands · Rainforest toward the Nicaraguan borderrainy

    One of the wettest parts of the country; rain most months, so plan indoor and river activities with wet-weather backup.

  • South Pacific Costa Rica: Costanera Sur coast · Dominical, Uvita, Ojochalrainy

    Dry season roughly December to April; heaviest rain September and October.

  • South Pacific Costa Rica: Osa Peninsula · Puerto Jiménez, Drake Bay, Corcovadorainy

    One of the wettest parts of Costa Rica; expect mud and leeches on trails in the wet months.

  • San José26 °C (79 °F) / 18 °C (64 °F), 23 rain days
  • Alajuela26 °C (79 °F) / 17 °C (63 °F), 21 rain days
  • Atenas27 °C (81 °F) / 18 °C (64 °F), 7 rain days
  • Bijagua de Upala28 °C (82 °F) / 19 °C (66 °F), 17 rain days
  • Brasilito32 °C (90 °F) / 24 °C (75 °F), 7 rain days
  • Bribri30 °C (86 °F) / 22 °C (72 °F), 14 rain days
  • Cabo Matapalo30 °C (86 °F) / 22 °C (72 °F), 22 rain days
  • Cahuita32 °C (90 °F) / 24 °C (75 °F), 14 rain days
  • Carate30 °C (86 °F) / 22 °C (72 °F), 21 rain days
  • Cartago25 °C (77 °F) / 16 °C (61 °F), 22 rain days
  • Curridabat25 °C (77 °F) / 16 °C (61 °F), 22 rain days
  • Dominical30 °C (86 °F) / 23 °C (73 °F), 21 rain days
  • Drake Bay32 °C (90 °F) / 25 °C (77 °F), 14 rain days
  • Esterillos31 °C (88 °F) / 23 °C (73 °F), 16 rain days
  • Finca Sonador29 °C (84 °F) / 22 °C (72 °F), 14 rain days
  • Golfito29 °C (84 °F) / 22 °C (72 °F), 12 rain days
  • Grecia29 °C (84 °F) / 22 °C (72 °F), 13 rain days
  • Heredia25 °C (77 °F) / 16 °C (61 °F), 22 rain days
  • Jacó30 °C (86 °F) / 22 °C (72 °F), 20 rain days
  • La Fortuna29 °C (84 °F) / 21 °C (70 °F), 21 rain days
  • Las Catalinas31 °C (88 °F) / 24 °C (75 °F), 18 rain days
  • Liberia30 °C (86 °F) / 23 °C (73 °F), 18 rain days
  • Los Chiles28 °C (82 °F) / 22 °C (72 °F), 10 rain days
  • Malpaís30 °C (86 °F) / 23 °C (73 °F), 18 rain days
  • Manuel Antonio30 °C (86 °F) / 23 °C (73 °F), 12 rain days
  • Montezuma28 °C (82 °F) / 22 °C (72 °F), 14 rain days
  • Nicoya30 °C (86 °F) / 22 °C (72 °F), 11 rain days
  • Nosara32 °C (90 °F) / 24 °C (75 °F), 9 rain days
  • Parismina33 °C (91 °F) / 24 °C (75 °F), 13 rain days
  • Pavones30 °C (86 °F) / 22 °C (72 °F), 24 rain days
  • Playa Carrillo31 °C (88 °F) / 24 °C (75 °F), 16 rain days
  • Playa Grande31 °C (88 °F) / 22 °C (72 °F), 12 rain days
  • Playa Hermosa, Garabito31 °C (88 °F) / 23 °C (73 °F), 14 rain days
  • Playa Hermosa, Osa28 °C (82 °F) / 22 °C (72 °F), 15 rain days
  • Playas del Coco32 °C (90 °F) / 22 °C (72 °F), 15 rain days
  • Pochote31 °C (88 °F) / 24 °C (75 °F), 12 rain days
  • Potrero32 °C (90 °F) / 24 °C (75 °F), 17 rain days
  • Providencia23 °C (73 °F) / 13 °C (55 °F), 20 rain days
  • Puerto Jimenez28 °C (82 °F) / 22 °C (72 °F), 14 rain days
  • Puerto Limón32 °C (90 °F) / 25 °C (77 °F), 13 rain days
  • Puerto Viejo de Sarapiquí29 °C (84 °F) / 22 °C (72 °F), 13 rain days
  • Puerto Viejo de Talamanca30 °C (86 °F) / 23 °C (73 °F), 14 rain days
  • Punta Uva31 °C (88 °F) / 24 °C (75 °F), 13 rain days
  • Quepos28 °C (82 °F) / 22 °C (72 °F), 22 rain days
  • Quesada29 °C (84 °F) / 22 °C (72 °F), 13 rain days
  • Sámara32 °C (90 °F) / 23 °C (73 °F), 10 rain days
  • San Gerardo de Dota22 °C (72 °F) / 13 °C (55 °F), 21 rain days
  • San Isidro de El General30 °C (86 °F) / 22 °C (72 °F), 13 rain days
  • San Pedro de Montes de Oca26 °C (79 °F) / 18 °C (64 °F), 22 rain days
  • San Ramón26 °C (79 °F) / 16 °C (61 °F), 11 rain days
  • Santa Elena32 °C (90 °F) / 23 °C (73 °F), 12 rain days
  • Santa Teresa30 °C (86 °F) / 24 °C (75 °F), 9 rain days
  • Sierpe32 °C (90 °F) / 23 °C (73 °F), 13 rain days
  • Sixaola29 °C (84 °F) / 24 °C (75 °F), 12 rain days
  • Tilarán29 °C (84 °F) / 20 °C (68 °F), 18 rain days
  • Tortuguero30 °C (86 °F) / 22 °C (72 °F), 17 rain days
  • Turrialba30 °C (86 °F) / 21 °C (70 °F), 12 rain days
  • Uvita30 °C (86 °F) / 23 °C (73 °F), 13 rain days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Independence Day

    15 Sep

    Torch relay and lantern parades (14 Sep evening).

Crowds and prices

Crowds · Costa Rica
Low
Prices · Costa Rica
Low

Compare two months

Weather, crowds and prices for any two months in Costa Rica, side by side.

  • Verdict

    Sep: Mixed

    Jan: Great (better)

  • Crowds

    Sep: Low

    Jan: High

  • Prices

    Sep: Low

    Jan: High

  • Festivals listed

    Sep: 1

    Jan: 3

September: Wettest on the Pacific; driest on the Caribbean — switch sides.

January: Dry and sunny on the Pacific; windy in Guanacaste; peak prices after New Year.

Costa Rica: figures are long-term averages from this guide, not a forecast.

What to pack

  • A rain jacket or umbrella and shoes that dry fast

Build the full packing list for your trip →

Where to go in September

Rated best or good this month

  • Caribbean

    Best weather of the year (Puerto Viejo, Cahuita, Tortuguero)

  • Bribri

    Best months: Feb–Apr, Sep–Oct

  • Cahuita

    Best months: Dec–Apr, Sep–Oct

  • Dominical

    Best months: Dec–Apr (dry season); Sep–Oct is quieter and greener

  • Golfito

    Best months: Dec–Apr, Jun–Sep

  • Jacó

    Best months: Dec–Apr (dry season); May–Nov is greener and cheaper with afternoon rain

  • Parismina

    Best months: Mar–Sep (turtle nesting season)

  • Puerto Jimenez

    Best months: Dec–Apr, Sep–Oct

  • Puerto Viejo de Sarapiquí

    Best months: Feb–Apr, Sep–Oct (check)

  • Puerto Viejo de Talamanca

    Best months: Feb–Apr, Sep–Oct

  • Punta Uva

    Best months: Sep–Oct, Feb–Apr

  • Sixaola

    Best months: Feb–Apr, Sep–Oct (check)