Kollam sits along Kerala's southwestern coast, where the vast Ashtamudi Lake spills into the Arabian Sea through eight branching channels. This ancient port city, once celebrated by travelers like Marco Polo and Ibn Battuta for its importance in the spice trade, is now recognized as India's cashew processing capital and the southern gateway to Kerala's legendary backwaters. Gliding through its canals on a traditional kettuvallam houseboat, passing coir-weaving villages and Chinese fishing nets, you'll find a Kerala that moves at a slower, more authentic pace than the more touristed waterways farther north.
Kollam's tropical climate keeps temperatures remarkably consistent year-round, so the real question is how much humidity and rain you're willing to handle. Your best window stretches from early October through late February, when humidity eases, skies stay dry, and the backwaters are at their most photogenic. This period also brings the President's Trophy Boat Race on Ashtamudi Lake in early November, the Munroe Island Festival in December, and the annual Crafts Festival spanning December and January. If you'd rather chase temple festivals, visit in April for Kollam Pooram, keeping in mind that temperatures peak during that stretch. Summer months from June through August bring the highest humidity, though you'll find the thinnest crowds and the most negotiable accommodation rates.
Spring in Kollam, India
March through May is when Kollam feels its warmest, with afternoon highs averaging 89.3°F (31.8°C) and overnight lows that rarely dip below 78.8°F (26°C). The intense tropical sun means mornings are best spent on backwater cruises or exploring the cool interiors of rock-cut cave temples like Kottukkal, dating back to the 6th century. Rain is virtually nonexistent during these months, so pack sunscreen and a wide-brimmed hat rather than an umbrella.
The highlight of spring is Kollam Pooram, a ten-day temple festival culminating in mid-April at the Asramam Sree Krishna Swamy Temple. Decorated elephants parade through the grounds while traditional drummers set the rhythm, and the celebration ends with a spectacular fireworks display that draws thousands. Mid-April marks peak heat, when highs push to 90.1°F (32.3°C) and lows hover at 79.4°F (26.3°C), so hydrate frequently and plan outdoor activities for early morning or late afternoon. March also brings the Paripally Gajamela, a grand elephant procession at Kodimoottil Bhagavathy Temple featuring around 50 caparisoned elephants, parasols, and peacock feather fans.
Tourism runs fairly slow during spring, which translates to deals on accommodation and shorter lines at Jatayu Earth's Center, where you can trek up to the world's largest bird sculpture perched 1,000 feet above sea level. Thangassery Lighthouse, a red-and-white-striped colonial beacon from 1902, is another good morning stop: climb to the top for sweeping views of the Arabian Sea before the midday heat settles in.
Summer in Kollam, India
June through August is Kollam's monsoon season, and while the data shows only two to four days of significant precipitation, humidity climbs to its annual peak, reaching 77.2% in July and making the warm air feel heavier. Highs average 85.9°F (29.9°C) with lows around 77.1°F (25.1°C), a slight reprieve from spring's more intense heat. The landscape transforms into deep, saturated green during these months, and the Western Ghats waterfalls, including the 300-foot Palaruvi Falls near Aryankavu, run at their most dramatic volume.
This is the quietest tourism season, so accommodation prices drop and you'll often have attractions to yourself. The Oachirakkali Festival, a mock sword-fighting ritual at Ochira Temple, typically falls in June or July and commemorates a historic battle between the kings of Travancore and Kayamkulam. By August, the Kallada and Paravur Kayal boat races get underway on local lakes, with teams competing in traditional snake boats, a thrilling display of coordination and raw power rooted in Kerala's maritime heritage.
Light breezes pick up during these months, the strongest of the year at around 5.6 mph, which offers some relief from the humidity. Lightweight, breathable clothing is essential, and a compact rain jacket will serve you better than a bulky umbrella for afternoon showers. Houseboat cruises on Ashtamudi Lake still operate through the monsoon, and the reduced boat traffic means quieter waterways.
Fall in Kollam, India
September ushers in drier conditions and gradually falling humidity, making it a comfortable time to explore Kollam's coastline and backwaters. Highs average 86.7°F (30.4°C) and lows settle at 77.1°F (25.1°C), with rain essentially absent through the season. The fall months mark the second busiest tourism period, which means accommodation rates tick up slightly, but you'll still avoid the peak-season density of winter.
The standout event is the President's Trophy Boat Race, held annually on Kerala Piravi Day in early November on Ashtamudi Lake. The normally calm backwaters transform into a competitive racecourse as snake boat teams churn through the water before cheering crowds lining the shore. If temple festivals interest you, the Pandrandu Vilakku Mahotsavam at Ochira typically falls in the November to December window. Munroe Island, a cluster of small islands accessible by canoe or small boat, is especially rewarding this time of year: bird activity picks up as migratory species arrive, and you can watch locals fish with Chinese nets, tap toddy from coconut palms, and weave coir rope by hand.
Sunset comes a bit earlier as the season progresses, with daylight dipping to about 11.7 hours by November, but mornings remain warm and bright enough for beach walks along Thirumullavaram or Thangassery. Pack light cotton layers for temple visits, where modest dress is expected, and bring comfortable walking shoes for the laterite paths around the Portuguese-era fort ruins near the Thangassery Lighthouse.
Winter in Kollam, India
December through February brings Kollam's most pleasant conditions. Humidity drops to its annual low of 61% in February, and rain is essentially nonexistent across these months. Highs average 87.5°F (30.8°C) with lows of 75.3°F (24.1°C), the coolest overnight temperatures you'll find here. The relative comfort makes this the ideal stretch for the eight-hour backwater cruise from Kollam to Alappuzha, widely considered Kerala's longest and most scenic houseboat route, winding past lotus-filled canals, coir-weaving villages, and Alumkadavu, the village where traditional kettuvallam houseboats have been handcrafted for generations.
Winter is the busiest tourism season, so book accommodation and houseboat cruises well in advance. The annual Crafts Festival, typically running from December into January, showcases artisan work from across India and adds cultural energy to the city. Churches in Kollam, including the historic Infant Jesus Cathedral in Thangasseri, built by the Portuguese in 1614, host grand Christmas services and light displays. For a quieter coastal experience, head to Thirumullavaram Beach or Azheekal Beach, both less crowded alternatives to the main Kollam Beach.
This is also the best window for day trips into the Western Ghats: the Shendurney Wildlife Sanctuary offers trekking through dense forest, and Thenmala, India's first planned ecotourism destination, sits within easy reach. At Jatayu Earth's Center, the clearer winter skies make the panoramic views from atop the massive bird sculpture even more striking. Carry a refillable water bottle and high-SPF sunscreen, as the tropical sun remains strong even when humidity is low.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Kollam, India
Kollam is roughly 70 kilometers north of Thiruvananthapuram (Trivandrum), the state capital and nearest airport. Trains connect Kollam to major cities across Kerala and beyond, and the railway station sits centrally in town. Auto-rickshaws are the most common local transport; agree on fares before you get in, as meters are rarely used. For temple visits, cover your shoulders and knees, and expect to remove shoes at the entrance.
Tap water is not safe to drink, so stick to bottled or filtered water and be cautious with street food until your stomach acclimates. Kollam's seafood, especially karimeen (pearl spot fish), crab, and prawns prepared in coconut-based Kerala curry, is outstanding, but choose vendors where turnover is high. The tropical heat can be deceptively intense even on overcast days, so carry water, wear sunscreen, and schedule strenuous outdoor activities for early morning.