Research shows that lawns do much better when they are watered deeply and infrequently. Golf courses have a completely different management than home lawns, so don't follow advice for greens management on your home lawn.
When you water, the moisture should penetrate to a depth of 6 to 8 inches in your soil. This will encourage the turf will grow roots deeper in the soil and help keep the plants healthier. Also mowing the turf to 3" instead of shorter helps keep the soil cooler by shading the soil surface.
Once the roots have penetrated to the deeper layers of soil, it will be better able to deal with any potential drought situations as well as fighting off insect pests or diseases.