Start at Tempe Town Lake
Tempe Town Lake sits on a dammed stretch of the Salt River just north of downtown, and it is the easiest place to begin a family day in Tempe. The paved path around the lake is flat and stroller-friendly, and there are multiple playgrounds along the shoreline, including equipment at Tempe Beach Park. Paddle boat and kayak rentals typically operate seasonally on the lake; check current hours and pricing before you go, since operators and schedules change. Shade is limited in the middle of the day, so bring hats and sunscreen even in cooler months.
Swimming and wading in Tempe Town Lake itself are not permitted — it's a flood-control reservoir, not a swimming lake, and city rules prohibit entering the water outside organized events. Keep kids to the shoreline path and playgrounds rather than the water's edge. If you rent a kayak, paddle boat, or other vessel, everyone on board needs a proper life jacket while the boat is underway; rental operators supply and require them.
Parking is available in several lots near Tempe Beach Park and around Mill Avenue, and on busy weekends you may need to walk a few blocks from your car. The lake connects directly to downtown Tempe, so it is easy to combine a lake visit with lunch on Mill Avenue afterward.
Cool off at a splash pad
Tempe has splash pads at several city parks, and they are one of the best free options for beating the heat with young kids. Facilities and operating seasons vary by park and by year, so check the City of Tempe parks and recreation site for which splash pads are currently open and their hours before you drive over. Most splash pad seasons run through the hottest months and close in cooler weather, so timing matters more here than at most attractions.
Bring water shoes, because pavement around splash pads gets hot fast, and pack towels and a change of clothes. These parks also tend to have shaded ramadas nearby, which are useful for a picnic lunch or a break from the sun.
Indoor options for hot or rainy days
When it is simply too hot for an outdoor plan, the aquarium at Arizona Mills mall (in south Tempe) is a reliable indoor option for younger kids, with touch tanks and tunnel viewing that hold attention for an hour or two. Arizona Mills itself has a movie theater and food court, so you can turn a single trip into a half-day plan without needing to move the car. Confirm current hours and ticket prices on the attraction's own site before you go, since both change periodically.
Downtown Tempe also has coffee shops and casual restaurants with air conditioning and patio seating, which makes it easy to alternate between short outdoor stretches and indoor breaks on a hot day.
Easy walkable outings near ASU
Tempe is home to Arizona State University's main campus, and the campus itself is worth a stroller lap if your kids like open plazas, fountains, and people-watching. Palm Walk, the historic pedestrian corridor through the older part of campus, is shaded and flat. The Novus Innovation Corridor area near the stadium has newer plazas and public art that younger kids often enjoy exploring.
Because campus and downtown Tempe sit close together, you can park once and cover both areas on foot, which simplifies logistics with a stroller or a toddler who wants to walk part of the way.
Food that works for picky eaters
Mill Avenue has a wide range of casual, kid-tolerant restaurants, from pizza to burgers to ice cream, most within a short walk of the lake. If you would rather eat where you can let kids run around afterward, several restaurants near Tempe Beach Park have patio seating with a view of the lake path, which makes it easy to keep an eye on older kids while you finish a meal.
A sample half-day plan
A workable sequence for a morning with young kids: start at a lake playground before the heat builds, walk or bike part of the lake path, break for a snack at a shaded ramada, then either head to a splash pad (in season) or move indoors to the aquarium if temperatures are too high. Save Mill Avenue dining for the end of the outing, when kids are ready to sit and you are ready for air conditioning.
For a broader look at what else Tempe offers beyond family activities, see the Tempe hub. If you are basing yourself in the Phoenix metro for a longer trip, the Phoenix guide covers additional family attractions a short drive away.