It is the route, not the month
The calmest water for a pirate boat trip with children in Side is not a month — it is a route. Our kids' pirate boats sail from the Manavgat River, and the river stays calm regardless of what the open sea is doing. If you want the flattest possible day, book a pirate boat that spends most of its time on the river and at the delta swim stop, and you can do that from spring through to the end of October.
If you are asking which month gives the gentlest sea on the open-water leg, the answer is June and September: warm enough to swim, before and after the strongest midsummer afternoon breeze.
Why the river answer matters more than the month
Parents worry about two different things and often mix them up: sea sickness and swim safety. The river handles both. The river is calm, which is exactly why we point families to it when they would rather avoid rough open sea. The swim stop is at the delta, where the icy fresh water of the Manavgat meets the warm, salty Mediterranean in shallow water, and children swim there in life jackets under adult supervision.
That is why the Side pirate boat trip works for families who would not put a small child on a full open-sea day. It runs about six hours: air-conditioned hotel pickup, a gentle run down the river to the delta, free face painting, a treasure map, tug-of-war and a foam party on deck on the way back, with a kid-approved lunch of spaghetti, chicken fingers and fish fingers. Adults €23, children €16.
Month by month for the open-sea part
April and May
The sea is often beautifully flat, and this is the quietest end of the season. The problem is temperature, not motion. The delta swim mixes cold river water into the sea, and in early season it is genuinely cold for a small child. Expect paddling rather than swimming.
June
The best month if your children actually want to be in the water. Warm sea, mornings still calm, boats not yet full. Our pirate days book up fast in peak season, and June is where the balance sits.
July and August
Warmest water of the year and the most reliable swimming, but afternoons build a breeze on the open leg and the decks get hot. Shade matters: the wooden pirate galleon has shaded lower decks as well as the open upper deck, which is a real advantage with toddlers in August. It runs around seven hours, adults €23 and children €16, with activities designed for ages 3 and up and children 0–2 free.
September
Our pick overall. The sea has had all summer to warm up, the afternoon breeze has eased, and the boats are calmer in every sense — fewer passengers, more space for children to move around.
October
Still lovely, and the closing month: the booking calendar for the pirate galleon runs to 31 October. Water is cooling and the foam party loses some of its appeal.
Which of the kids' boats is gentlest
- Little Pirates boat tour — adults €20, children €14, about six hours. The most contained of the three: costumes handed out on board, a treasure hunt, coastal cruising and swimming stops, lunch and soft drinks included. Built specifically for young children, with parents staying alongside throughout.
- Side pirate boat tour — adults €23, children €16, about six hours. River route with the two-water delta swim, free face painting, animation team and a foam party.
- Pirate boat adventure — adults €23, children €16, about seven hours on a multi-deck wooden galleon with a beach treasure hunt. Life jackets for all ages and sea insurance are included. Note it does not sail every day; pick an available date in the booking calendar. All drinks, including water, are bought at the on-board bar, so carry cash.
If your children are older and you want more open water and a chance of wild dolphins and Caretta Caretta turtles, the Dolphin Island boat trip is the step up — adults €21, children €15, with a swim where the cold river pours into the warm sea and a longer one off Dolphin Island. Sightings are never guaranteed, and we will not pretend they are.
Who these boats are not for
- Families with babies under three. The pirate activities are designed for ages 3 and up. Infants travel free, but they are passengers, not participants, and a six-hour day is long for them.
- Anyone wanting a quiet, scenic cruise. There is music, an animation team and a foam party. That is the product. If you want calm water and no noise, take a river cruise instead.
- Very early or very late season swimmers. If the swim is the whole reason you are booking, April and late October will disappoint children who feel the cold.
- Guests who assume drinks are included. On the galleon they are not, water included.
Getting the date right
Book ahead in peak season — these fill faster than any other family day we sell — and remember the pirate galleon runs only on certain days of the week, so check the calendar before you fix anything else. Reservation is free, you pay on the day, and cancellation is free up to 24 hours before, which is the cheapest insurance there is against a windy forecast.
For the rest of the planning, read pirate boat or dolphin boat, which suits your family, check what the pirate and dolphin boats cost, and pack from our pirate boat packing list before the morning arrives.